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High corrosion and wear resistant electroless Ni–P gradient coatings on aviation aluminum alloy parts 被引量:2
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作者 Bo Wang Jiawei Li +2 位作者 Zhihui Xie Gengjie Wang Gang Yu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CSCD 2024年第1期155-164,共10页
A Ni–P alloy gradient coating consisting of multiple electroless Ni–P layers with various phosphorus contents was prepared on the aviation aluminum alloy. Several characterization and electrochemical techniques were... A Ni–P alloy gradient coating consisting of multiple electroless Ni–P layers with various phosphorus contents was prepared on the aviation aluminum alloy. Several characterization and electrochemical techniques were used to characterize the different Ni–P coatings’ morphologies, phase structures, elemental compositions, and corrosion protection. The gradient coating showed good adhesion and high corrosion and wear resistance, enabling the application of aluminum alloy in harsh environments. The results showed that the double zinc immersion was vital in obtaining excellent adhesion (81.2 N). The optimal coating was not peeled and shredded even after bending tests with angles higher than 90°and was not corroded visually after 500 h of neutral salt spray test at 35℃. The high corrosion resistance was attributed to the misaligning of these micro defects in the three different nickel alloy layers and the amorphous structure of the high P content in the outer layer. These findings guide the exploration of functional gradient coatings that meet the high application requirement of aluminum alloy parts in complicated and harsh aviation environments. 展开更多
关键词 aluminum alloy electroless nickel coating CORROSION ADHESION
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Tribological Behaviors of Electroless Nickel-Boron Coating on Titanium Alloy Surface
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作者 Yao Jia Jianping Lai +3 位作者 Jiaxin Yu Huimin Qi Yafeng Zhang Hongtu He 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2024年第1期309-320,共12页
Titanium alloys are excellent structural materials in engineering fields,but their poor tribological properties limit their further applications.Electroless plating is an effective method to enhance the tribological p... Titanium alloys are excellent structural materials in engineering fields,but their poor tribological properties limit their further applications.Electroless plating is an effective method to enhance the tribological performance of alloys,but it is difficult to efficiently apply to titanium alloys,due to titanium alloy’s strong chemical activity.In this work,the electroless Nickel-Boron(Ni-B)coating was successfully deposited on the surface of titanium alloy(Ti-6AL-4V)via a new pre-treatment process.Then,linearly reciprocating sliding wear tests were performed to evaluate the tribological behaviors of titanium alloy and its electroless Ni-B coatings.It was found that the Ni-B coatings can decrease the wear rate of the titanium alloy from 19.89×10^(−3)mm^(3)to 0.41×10^(−3)mm^(3),which attributes to the much higher hardness of Ni-B coatings.After heat treatment,the hardness of Ni-B coating further increases corresponding to coating crystallization and hard phase formation.However,heat treatment does not improve the tribological performance of Ni-B coating,due to the fact that higher brittleness and more severe oxidative wear exacerbate the damage of heat-treated coatings.Furthermore,the Ni-B coatings heat-treated both in air and nitrogen almost present the same tribological performance.The finding of this work on electroless coating would further extend the practical applications of titanium alloys in the engineering fields. 展开更多
关键词 electroless coating Titanium alloy TRIBOLOGY WEAR Heat treatment NANOINDENTATION
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Microstructure and electrical conductivity of electroless copper plating layer on magnesium alloy micro-arc oxidation coating 被引量:4
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作者 Tao LI Zhong-jun LENG +4 位作者 Xi-tao WANG Shi-fang WANG Su-qing ZHANG Yuan-sheng YANG Ji-xue ZHOU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第12期3950-3962,共13页
In order to impart electrical conductivity to the magnesium alloy micro-arc oxidation(MAO)coating,the electroless copper plating was performed.Effects of plating temperature and complexing agent concentration on the p... In order to impart electrical conductivity to the magnesium alloy micro-arc oxidation(MAO)coating,the electroless copper plating was performed.Effects of plating temperature and complexing agent concentration on the properties of the electroless copper plating layers were studied by measuring their microstructure,corrosion resistance and electrical conductivity.It was found that the optimized plating temperature was 60°C,and the most suitable value of the complexing agent concentration was 30 g/L.Under this condition,a complete and dense plating layer could be obtained.The formation mechanism of the plating layer on magnesium alloy MAO coating was analyzed.A three-stage model of the plating process was proposed.The square resistance of the plated specimen was finally reduced to 0.03Ω/□after the third stage.Through electroless copper plating,the MAO coated sample obtained excellent electrical conductivity without significantly reducing its corrosion resistance. 展开更多
关键词 electroless copper plating electrical conductivity MAO coating magnesium alloy
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Effects of zincate treatment on adhesion of electroless Ni-P coating onto various aluminum alloys 被引量:14
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作者 Makoto HINO Koji MURAKAMI +2 位作者 Yutaka MITO OKA Ken MURAOKA Teruto KANADANI 《中国有色金属学会会刊:英文版》 EI CSCD 2009年第4期814-818,共5页
The effects of alloying elements on zincate treatment and adhesion of electroless Ni-P coating onto various aluminum alloy substrates were examined.Surface morphology of zinc deposits in the 1st zincate treatment and ... The effects of alloying elements on zincate treatment and adhesion of electroless Ni-P coating onto various aluminum alloy substrates were examined.Surface morphology of zinc deposits in the 1st zincate treatment and its adhesion were changed depending on the alloying element.The zinc deposits in the 2nd zincate treatment became thinly uniform,and the adhesion between aluminum alloy substrate and Ni-P coating was improved irrespective of the alloying element.XPS analysis revealed the existence of zinc on the surface of each aluminum alloy substrate after the pickling in 5% nitric acid.This zinc on the surface should be an important factor influencing the morphology of zinc deposit at the 2nd zincate treatment and its adhesion. 展开更多
关键词 化学镀镍 锌酸盐 铝合金 治疗 合金涂层 粘连 合金元素 表面形貌
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Research of Kinetics of Electroless Ni-Cu-P Alloy Plating on Polyester Fabric
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作者 陈震兵 陈小立 《Journal of Donghua University(English Edition)》 EI CAS 2002年第2期41-43,共3页
All the variables that may affect the Ni-Cu-P alloy deposition rate on polyester fabric were studied , and the activation energy and the reaction orders were determined. The deposition rate equation was also derived.
关键词 electroless plating ni-cu-p alloy REACTION kinetics PET FABRIC
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A novel dual nickel coating on AZ91D magnesium alloy
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作者 宋影伟 单大勇 +1 位作者 陈容石 韩恩厚 《中国有色金属学会会刊:英文版》 CSCD 2008年第A01期339-343,共5页
Magnesium alloys covered with metal coating display excellent corrosion resistance,wear resistance,conductivity and electromagnetic shielding properties.The electroless plating Ni-P as bottom layer following the elect... Magnesium alloys covered with metal coating display excellent corrosion resistance,wear resistance,conductivity and electromagnetic shielding properties.The electroless plating Ni-P as bottom layer following the electroplating nickel as surface layer on AZ91D magnesium alloy was investigated.The coating surface morphology was observed with SEM and the structure was analyzed with XRD.Electrochemical tests and salt spray tests were carried out to study the corrosion resistance.The experimental results indicate that the dual coating is uniform,compact and pore-free.The adhesion strength between magnesium alloy substrate and electroless plating Ni-P bottom layer and electroplating nickel surface layer is perfect.The corrosion resistance of AZ91D magnesium alloy is greatly improved after being protected with the dual coating. 展开更多
关键词 AZ91D镁合金 耐蚀性能 防护性能 热处理
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Electroless Ni-P plating on Mg-Li alloy by two-step method 被引量:11
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作者 罗洪杰 宋滨娜 +1 位作者 刘宜汉 姚广春 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第10期2225-2230,共6页
Pretreated Mg-Li alloy sheets were pre-plated in a NiCO3?2Ni(OH)2?4H2O solution to form a thin Ni-P alloy film and then plating in a NiSO4?6H2O solution was carried out to obtain a protective coating.The surface ... Pretreated Mg-Li alloy sheets were pre-plated in a NiCO3?2Ni(OH)2?4H2O solution to form a thin Ni-P alloy film and then plating in a NiSO4?6H2O solution was carried out to obtain a protective coating.The surface morphology,structure and corrosion resistance of the coating were studied.The results showed that a flat,bright and compact plating layer,which was integrated into the matrix metal,was obtained.The P content of the Ni-P coating reached 13.56%(mass fraction).The hardness value of the Ni-P coating was about HV 549.The polarization curve showed that the corrosion potential of the Ni-P coating reached ?0.249 V(vs SCE).A long passivation region was found on the polarization curve,and this phenomenon indicated that the coating has an excellent anti-corrosion property. 展开更多
关键词 Mg-Li alloy PRETREATMENT electroless plating Ni-P coating corrosion resistance
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An in situ measure method to study deposition mechanism of electroless Ni-P plating on AZ31 magnesium alloy 被引量:7
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作者 秦铁男 马立群 +3 位作者 姚妍 倪聪 赵相玉 丁毅 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第12期2790-2797,共8页
An in situ method was designed to measure a continuous open circuit potential (OCP) curve of AZ31 magnesium alloy and to observe the morphology variation of Ni-P coating during the process of the electroless plating... An in situ method was designed to measure a continuous open circuit potential (OCP) curve of AZ31 magnesium alloy and to observe the morphology variation of Ni-P coating during the process of the electroless plating. The deposition mechanism of the electroless Ni-P plating on AZ31 Mg alloy was studied by OCP curve, scanning electron microscopy (SEM), and energy dispersion spectroscopy (EDS). The process of electroless Ni-P plating contains the coating formation stage and the coating growth stage. The formation stage includes three procedures, i.e., the nucleation and growth of Ni crystallites, the extension of the coating in two-dimensional (2D) direction and the coalescence of the coating along three-dimensional (3D) direction. SEM investigations demonstrate that the spherical nodules of the Ni-P coating are not only formed during the coating growth stage, but also generated in the initial deposition stage of electroless Ni-P plating. The variation of the coating rates at different deposition stages corresponds to the deposition mechanism of their respective deposition stage. 展开更多
关键词 magnesium alloy electroless Ni-P deposition NUCLEATION coating rate
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Effect of novel ternary ligand system on acidic electroless Ni-P plating on AZ91D magnesium alloy 被引量:5
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作者 王慧龙 刘凌云 姜文凤 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第9期3014-3022,共9页
The electroless Ni-P coatings on AZ91 D magnesium alloy substrate were prepared using the acidic hypophosphite-reduced electroless nickel bath containing the novel ternary ligand system. The results indicate that the ... The electroless Ni-P coatings on AZ91 D magnesium alloy substrate were prepared using the acidic hypophosphite-reduced electroless nickel bath containing the novel ternary ligand system. The results indicate that the deposition rate varies with the ternary ligand concentration in plating solution. The structural and morphological characteristics of the coatings were analyzed by XRD and SEM. The anticorrosion properties of the Ni-P coatings were evaluated in 3.5% NaCl solution by electrochemical impedance and potentiodynamic polarization methods. The amount of ternary ligands in electroless plating bath has an significant effect on the surface morphology and structure of Ni-P coatings. The decrease of crystallization temperature and increase of crystallization heat of all the deposits with an increase in ternary ligand concentration are found by DSC measurements. The coating obtained with 0.035 mol/L ternary ligand additive in plating bath can offer a better surface homogeneity and improve corrosion resistance. 展开更多
关键词 LIGAND electroless deposition Ni-P coating magnesium alloy
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Formation mechanism of electroless plating nickel-based composite coating on highly active rare earth magnesium alloys and its corrosion resistance and adhesion performance
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作者 WANG Bo LI Jia-wei +3 位作者 XIE Zhi-hui LIU Kang XU Tao YU Gang 《Journal of Central South University》 SCIE EI CAS 2024年第10期3517-3531,共15页
The process of preparing anodic oxide film containing active sites and electroless nickel plating on highly active rare earth magnesium alloy was developed.The formation mechanism of electroless nickel plating on acti... The process of preparing anodic oxide film containing active sites and electroless nickel plating on highly active rare earth magnesium alloy was developed.The formation mechanism of electroless nickel plating on active anodic oxide film and the structure and properties of the composite coating were studied by several surface and electrochemical techniques.The results showed that Ag nanograins with an average size of 10 nm were embedded into the anodic oxide film with pores of 0.1−2μm.Ag nanoparticles provided a catalytic site for the deposition of Ni-B alloy,and the Ni crystal nucleus was first grown in horizontal mode and then in cylindrical mode.The corrosion potential of the composite coating increased by 1.37 V and the corrosion current reduced two orders of magnitude due to the subsequent deposition of Ni-P alloy.The high corrosion resistance was attributed to the misaligning of these micro defects in the three different layers and the amorphous structure of the Ni-P alloy in the outer layer.These findings provide a new idea for electroless nickel plating on anodic oxide film. 展开更多
关键词 rare earth magnesium alloy electroless nickel plating composite coating Ag+activation active anodic oxidation film growth mechanism
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Progress of electroplating and electroless plating on magnesium alloy 被引量:8
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作者 伍立坪 赵京京 +1 位作者 谢永平 杨中东 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期630-637,共8页
The current research processes of electroplating and electroless Ni-P alloy plating on magnesium alloys were reviewed. Theoretically,the reason for difficulties in electroplating and electroless plating on magnesium a... The current research processes of electroplating and electroless Ni-P alloy plating on magnesium alloys were reviewed. Theoretically,the reason for difficulties in electroplating and electroless plating on magnesium alloys was given.The zinc immersion, copper immersion,direct electroless Ni-P alloy plating and electroplating and electroless plating on magnesium alloys prepared by chemical conversion coating were presented in detail.Especially,the research development of magnesium alloy AZ91 and AZ31 was discussed briefly.Based on the analysis,the existing problems and future research directions were then given. 展开更多
关键词 magnesium alloy ELECTROPLATING electroless Ni-P alloy chemical conversion coating zinc immersion/copper direct electroless Ni-P alloy plating
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Influence of pH values on electroless Ni-P-SiC plating on AZ91D magnesium alloy 被引量:5
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作者 沟引宁 黄伟九 +1 位作者 曾荣昌 朱翊 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期674-678,共5页
A novel Ni-P-SiC composite coating was prepared by electroless plating in order to improve the corrosion capacity and wear resistance of AZ91D magnesium alloy.The influence of pH values on deposition rates and propert... A novel Ni-P-SiC composite coating was prepared by electroless plating in order to improve the corrosion capacity and wear resistance of AZ91D magnesium alloy.The influence of pH values on deposition rates and properties of the coatings was studied.The microstructure and phase structure of the Ni-P-SiC coatings were analyzed by scanning electron microscopy(SEM)and X-ray diffractometry(XRD).The corrosion and wear resistance performances of the coatings were also investigated through electrochemical technique and pin-on-disk tribometer,respectively.The results indicate that the composite coating is composed of Ni, P and SiC.It exhibits an amorphous structure and good adhesion to the substrate.The coatings have higher open circuit potential than that of the substrate.The composite coating obtained at pH value of 5.2 possesses optimal integrated properties,which shows similar corrosion resistance and ascendant wear resistance properties to the substrate. 展开更多
关键词 electroless plating Ni-P-SiC composite coating magnesium alloy CORROSION wear resistance
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High-temperature Compressive Performance of Mg Alloy Foams Coated with Ni-P Layer 被引量:4
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作者 LU Xiaotong LUO Hongjie +2 位作者 ZHANG Zhigang DU Hao HUANG Wenzhan 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第4期805-811,共7页
Mg/Ni hybrid foams were fabricated by the electroless method.The Ni-P(Nickel-Phosphorous)coatings were deposited on the surface of closed-cell Mg alloy foams.The composition,microstructure and phases of the Ni-P coati... Mg/Ni hybrid foams were fabricated by the electroless method.The Ni-P(Nickel-Phosphorous)coatings were deposited on the surface of closed-cell Mg alloy foams.The composition,microstructure and phases of the Ni-P coatings were characterized by scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDS)and X-ray diffraction(XRD),respectively.The compressive tests were performed on the Mg/Ni hybrid foams at 400℃using the Mg alloy foams as a reference.The experimental results show that the yield strength,plateau stress and energy absorption capacity of the closed-cell Mg alloy foams at high temperature were improved by the Ni-P coating.And there are four main modes for the Mg/Ni hybrid foam failure at 400℃,i e,shearing in cell wall,bending in cell edge,shedding and cracking in Ni-P coating. 展开更多
关键词 Mg alloy foams electroless plating high temperature compressive behavior Ni-P coating
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A novel electroless silver depositing method for magnesium alloys
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作者 赵惠 崔建忠 《中国有色金属学会会刊:英文版》 CSCD 2006年第A03期1835-1839,共5页
Depositing silver on magnesium alloy by both electroless plating and organic coatings was studied. The organic coating was made by immersing samples in organosilicon heat-resisting varnish. In this method the organic ... Depositing silver on magnesium alloy by both electroless plating and organic coatings was studied. The organic coating was made by immersing samples in organosilicon heat-resisting varnish. In this method the organic coating acts as interlayer between the substrate and silver film. When the reaction starts, silver deposits directly on the interlayer. X-ray diffraction and SEM analysis were used to determine the composition and morphology of the interlayer and silver film. The potentiodynamic polarization curves for corrosion studies of coated magnesium alloys were performed in a corrosive environment of 3.5% NaCl(mass fraction) at neutral pH (6.9). The results indicate that compared with the substrate, the corrosion resistance of coated magnesium alloys increases greatly. Moreover, the method proposed in this work is environmentally friendly, non-toxic chemicals were used. In addition, it provides a new concept for the corrosion inhibition of magnesium alloys. 展开更多
关键词 电镀工艺 镁合金 有机涂层 金属腐蚀 腐蚀控制方法
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NdFeB磁性材料化学镀Ni-Cu-P合金沉积机理研究 被引量:6
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作者 王憨鹰 陈焕铭 +1 位作者 徐靖 孙安 《兵器材料科学与工程》 CAS CSCD 2009年第1期50-53,共4页
通过对不同时间序列(0.5、1、10、20、40、60min)镀层的深入研究,提出Ni-Cu-P非晶态合金镀层形核与长大过程的沉积模型,并对不同时间序列非晶态合金镀层的形貌和结构研究表明:在施镀初期,Ni、Cu原子团优先沉积于基体表面能量较高的部位... 通过对不同时间序列(0.5、1、10、20、40、60min)镀层的深入研究,提出Ni-Cu-P非晶态合金镀层形核与长大过程的沉积模型,并对不同时间序列非晶态合金镀层的形貌和结构研究表明:在施镀初期,Ni、Cu原子团优先沉积于基体表面能量较高的部位,并开始形核且以不规则形态长大;在施镀后期,随着P含量的不断增加,镀层形貌逐渐由不规则形态变为规则胞状形态,直至形成光滑平整的非晶态镀层。 展开更多
关键词 化学镀 ni-cu-p合金 沉积过程 优先沉积 非晶态镀层
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偶联剂在PVC塑料化学镀Ni-Cu-P前处理中的应用 被引量:6
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作者 张勇 闫军 +1 位作者 崔海萍 安振涛 《材料保护》 CAS CSCD 北大核心 2008年第1期65-67,共3页
针对塑料化学镀过程中传统铬酸粗化处理工艺对环境及人体有害的缺点,选用偶联剂代替铬酸对塑料进行表面处理。研究了硅烷偶联剂KH550、KH560和钛酸酯类偶联剂NTC-4013种偶联剂的处理效果。结果表明,PVC塑料经过KH560处理后可以获得亲水... 针对塑料化学镀过程中传统铬酸粗化处理工艺对环境及人体有害的缺点,选用偶联剂代替铬酸对塑料进行表面处理。研究了硅烷偶联剂KH550、KH560和钛酸酯类偶联剂NTC-4013种偶联剂的处理效果。结果表明,PVC塑料经过KH560处理后可以获得亲水性良好的表面层。对偶联剂处理后的PVC塑料进行化学镀Ni-Cu-P合金,镀层的XRD分析表明Ni-Cu-P为非晶态。用划痕法和弯折试验测试了镀层与基体间的结合力,通过扫描电镜观察了镀层表面形貌,EDS分析显示表面层由81.5%Ni、15.3%Cu和3.2%P组成。 展开更多
关键词 粗化处理 硅烷偶联剂 PVC塑料 化学镀ni-cu-p 前处理
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超声波对铝合金表面化学镀Ni-Cu-P层性能的影响 被引量:4
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作者 刘丽 张维洪 +2 位作者 杨惟翔 张朝成 任呈强 《材料保护》 CAS CSCD 北大核心 2015年第11期18-20,41,共3页
超声波辅助化学镀可以改善镀层性能,而目前鲜见将超声波引入铝合金表面化学镀Ni-Cu-P的报道。采用二次浸锌工艺对6061铝合金进行前处理,再制备Ni-Cu-P化学镀层,对比了有无超声波辅助化学镀Ni-Cu-P层的结构与性能。结果表明:超声波改变... 超声波辅助化学镀可以改善镀层性能,而目前鲜见将超声波引入铝合金表面化学镀Ni-Cu-P的报道。采用二次浸锌工艺对6061铝合金进行前处理,再制备Ni-Cu-P化学镀层,对比了有无超声波辅助化学镀Ni-Cu-P层的结构与性能。结果表明:超声波改变了化学镀Ni-Cu-P的沉积速度和结晶过程,有助于形成均匀、致密、较厚的镀层,从而提高了镀层的耐磨性和耐腐蚀性。 展开更多
关键词 化学镀ni-cu-p 6061铝合金 超声波 镀层性能
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NdFeB磁性基材化学镀Ni-Cu-P初期形核过程及机制 被引量:2
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作者 王憨鹰 陈焕铭 +1 位作者 李成荣 刘炜 《材料保护》 CAS CSCD 北大核心 2011年第10期29-31,7,共3页
为了弄清NdFeB磁性材料表面化学镀Ni-Cu-P合金初期形核过程及机制,研究了不同时间化学镀Ni-Cu-P合金层初期形核过程、形貌和组织结构特征。结果表明:初期沉积过程具有明显的择优倾向和不均匀性;Ni和Cu原子并非以单个原子的形式沉积于基... 为了弄清NdFeB磁性材料表面化学镀Ni-Cu-P合金初期形核过程及机制,研究了不同时间化学镀Ni-Cu-P合金层初期形核过程、形貌和组织结构特征。结果表明:初期沉积过程具有明显的择优倾向和不均匀性;Ni和Cu原子并非以单个原子的形式沉积于基体表面,而是还原后在固-液界面处形成原子团在基体表面高能量区域优先沉积形核,然后以不规则的形态长大直至覆盖基体表面,形成晶态镀层。 展开更多
关键词 化学镀ni-cu-p合金 沉积过程 初期形核 晶态镀层 形核机制
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化学镀Ni-Cu-P合金镀层 被引量:3
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作者 张志明 黄新民 +1 位作者 刘岩 何美清 《电镀与精饰》 CAS 2007年第2期12-15,共4页
研究了化学镀镍-铜-磷镀液的组成、pH、温度等工艺参数对化学镀镍-铜-磷镀层镀速和组织性能的影响。通过透射电子显微镜和显微硬度仪等仪器对镀层的组织性能进行研究,从而得到组成与工艺对于镀层组织性能的影响规律,结果表明当热处理温... 研究了化学镀镍-铜-磷镀液的组成、pH、温度等工艺参数对化学镀镍-铜-磷镀层镀速和组织性能的影响。通过透射电子显微镜和显微硬度仪等仪器对镀层的组织性能进行研究,从而得到组成与工艺对于镀层组织性能的影响规律,结果表明当热处理温度在400℃时,镀层的显微硬度最高,可以达到1080 HV。 展开更多
关键词 化学镀 镍-铜-磷合金镀层 组织性能
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中温酸性化学镀Ni-Cu-P合金镀层腐蚀行为研究 被引量:2
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作者 亢淑梅 陈婷婷 +2 位作者 彭启超 孙思航 刘宇楠 《电镀与精饰》 CAS 北大核心 2016年第1期6-9,共4页
在中温酸性条件下用化学沉积方法制备了Ni-Cu-P合金镀层,采用扫描电镜、能谱分析仪及Autolab工作站研究了镀层的耐蚀性能,确定了化学镀Ni-Cu-P合金的最佳工艺。其最佳工艺为:25 g/L NiSO_4·6H_2O,0.05 g/L CuSO_4·5H_2O,40 g/... 在中温酸性条件下用化学沉积方法制备了Ni-Cu-P合金镀层,采用扫描电镜、能谱分析仪及Autolab工作站研究了镀层的耐蚀性能,确定了化学镀Ni-Cu-P合金的最佳工艺。其最佳工艺为:25 g/L NiSO_4·6H_2O,0.05 g/L CuSO_4·5H_2O,40 g/L C_6H_5Na_3O_7·2H_2O,25 g/L NaH_2PO_2·H_2O、15 g/L CH_3COONa,0.03 g/L KIO_3,0.01 g/L C_(12)H_(25)NaO_4SO_3,pH为(4.75±0.01),θ为(80±1)℃,沉积t为2 h。研究结果显示,中温酸性化学镀Ni-Cu-P合金镀层的腐蚀电流密度明显低于化学镀镍-磷合金镀层以及基体材料的腐蚀电流密度,其耐蚀性得到显著提高。 展开更多
关键词 化学镀 Ni—Cu—P合金镀层 电化学腐蚀 耐蚀性
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