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Corrosion of Q235 steel affected by Pseudodesulfovibrio cashew differed with electron acceptors
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作者 GAO Yao-hua WU Jia-jia +8 位作者 ZHANG Dun WANG Peng WANG Yi LI Ce ZHU Li-yang WANG Wen-kai ZHENG Ri-kuan SUN Chao-min SAND Wolfgang 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第10期3352-3368,共17页
Sulfate and nitrate reducing bacteria are important culprits for microbiologically influenced corrosion(MIC)using sulfate and nitrate as electron acceptors,respectively.Sulfate and nitrate hold different standard elec... Sulfate and nitrate reducing bacteria are important culprits for microbiologically influenced corrosion(MIC)using sulfate and nitrate as electron acceptors,respectively.Sulfate and nitrate hold different standard electrode potentials,which may lead to differences in corrosion,but their effects on corrosion by the same bacteria have not been reported.The corrosion of Q235 steel affected by Pseudodesulfovibrio cashew(P.cashew)in the sulfate and nitrate media under carbon starvation was studied.It was found that sulfate and nitrate did not lead to differences in corrosion under abiotic conditions.However,P.cashew promoted corrosion in both cases,and the consumption of H_(2)was the main mechanism for MIC.In addition,corrosion was more severe in the sulfate media.The higher corrosivity of P.cashew with sulfate as the electron acceptor is closely related to the higher number of sessile cells in the biofilm,higher bacterial motility,more hydrogen production pathways,and the increased gene expression of enzymes related to energy synthesis. 展开更多
关键词 Q235 steel electron acceptors microbiologically influenced corrosion P.cashew
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糖基季铵盐双子表面活性剂的缓蚀性能 被引量:6
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作者 王军 陈玉菲 +2 位作者 李妮妮 杨许召 邹文苑 《腐蚀与防护》 CAS 北大核心 2015年第2期144-147,共4页
由葡萄糖和十四烷基二甲基叔胺合成的糖基季铵盐双子表面活性剂(C14-GDQ)作为缓蚀剂,用静态失重法研究了该表面活性剂在1 mol/L盐酸溶液中对Q235钢的缓蚀作用。结果表明,在1 mol/L盐酸溶液中C14-GDQ对Q235钢具有良好的缓蚀作用,缓蚀率... 由葡萄糖和十四烷基二甲基叔胺合成的糖基季铵盐双子表面活性剂(C14-GDQ)作为缓蚀剂,用静态失重法研究了该表面活性剂在1 mol/L盐酸溶液中对Q235钢的缓蚀作用。结果表明,在1 mol/L盐酸溶液中C14-GDQ对Q235钢具有良好的缓蚀作用,缓蚀率随缓蚀剂浓度的增加而增大,当缓蚀剂质量浓度达到0.1mmol/L时缓蚀率趋于稳定。通过吸附理论、动力学和热力学公式得到相应的参数,并讨论了缓蚀作用机理。 展开更多
关键词 表面活性剂 Q235钢 缓蚀 糖基季铵盐双子表面活性剂
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高氯油田水溶液中咪唑类缓蚀剂的性能 被引量:6
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作者 左秀丽 舒建华 +1 位作者 王志民 何天稀 《腐蚀与防护》 CAS 北大核心 2015年第2期148-151,176,共5页
采用失重试验和电化学方法研究了苯并咪唑及6-硝基苯并咪唑两种缓蚀剂在含氯油田水溶液中对Q235钢的缓蚀作用,并探讨其缓蚀机理,研究了两种缓蚀剂添加量对缓蚀效率的影响。结果表明,苯并咪唑及6-硝基苯并咪唑缓蚀剂都具对Q235钢有明显... 采用失重试验和电化学方法研究了苯并咪唑及6-硝基苯并咪唑两种缓蚀剂在含氯油田水溶液中对Q235钢的缓蚀作用,并探讨其缓蚀机理,研究了两种缓蚀剂添加量对缓蚀效率的影响。结果表明,苯并咪唑及6-硝基苯并咪唑缓蚀剂都具对Q235钢有明显的缓蚀作用,苯并咪唑缓蚀率随着浓度增大呈现增大趋势,浓度为1.0g/L时缓蚀效果最好,缓蚀率达90.41%;6-硝基苯并咪唑的缓蚀率随着浓度的增大具有极值效应,当浓度为0.5g/L时,最大缓蚀率为84.78%。极化曲线和电化学阻抗谱试验结果与失重法的结果一致,都表明在油田水溶液中苯并咪唑的缓蚀率较6-硝基苯并咪唑高。苯并咪唑的缓蚀效果较6-硝基苯并咪唑更好,且两种缓蚀剂在Q235钢表面的吸附都为自发过程,符合Langmuir吸附等温式。 展开更多
关键词 苯并咪唑 6-硝基苯并咪唑 Q235钢 缓蚀剂
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植酸自组装膜对Q235钢在氯化钠溶液中的缓蚀作用 被引量:1
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作者 王凤平 胡隋军 唐丽娜 《辽宁师范大学学报(自然科学版)》 CAS 2014年第2期233-237,共5页
从植物中提取的植酸作金属缓蚀剂对环境保护具有重要意义.采用失重法、扫描电子显微镜和X射线能谱研究了植酸对Q235钢在NaCl溶液中的缓蚀行为以及影响因素.失重实验结果表明,不同pH值植酸对Q235钢的缓蚀效果明显不同,在酸性条件下植酸加... 从植物中提取的植酸作金属缓蚀剂对环境保护具有重要意义.采用失重法、扫描电子显微镜和X射线能谱研究了植酸对Q235钢在NaCl溶液中的缓蚀行为以及影响因素.失重实验结果表明,不同pH值植酸对Q235钢的缓蚀效果明显不同,在酸性条件下植酸加速Q235钢的腐蚀,在中性及碱性条件下,植酸对Q235钢的腐蚀具有明显的抑制作用.中性或碱性条件下,NaCl溶液中植酸对Q235钢缓蚀效率随植酸浓度的增加而增加,植酸浓度达0.5%以上时,缓蚀效率高达90%以上.扫描电镜结果表明,植酸处理后的Q235钢表面生成膜在不同pH下明显不同,碱性条件下的生成膜明显好于酸性条件下的生成膜. 展开更多
关键词 植酸 Q235钢 缓蚀行为 影响因素
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交流杂散电流对酸性土壤中Q235钢的腐蚀行为研究 被引量:2
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作者 余建飞 张明 张予 《湖北电力》 2015年第6期45-48,共4页
通过失重试验、显微镜和电化学极化曲线,研究了交流杂散电流对接地网常用材料Q235钢在含水率为30%时的酸性土壤中腐蚀特性的影响。结果表明:Q235钢在酸性土壤中,无论是否施加交流杂散电流,金属的腐蚀主要集中在试样的下部,主要为局部腐... 通过失重试验、显微镜和电化学极化曲线,研究了交流杂散电流对接地网常用材料Q235钢在含水率为30%时的酸性土壤中腐蚀特性的影响。结果表明:Q235钢在酸性土壤中,无论是否施加交流杂散电流,金属的腐蚀主要集中在试样的下部,主要为局部腐蚀;随着所施加的交流电流增大,Q235钢的失重速率和腐蚀电流密度增大;随着腐蚀时间的增加,腐蚀电流密度逐渐减小,趋于稳定。 展开更多
关键词 酸性土壤 腐蚀 交流杂散电流 Q235钢
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新型吡啶季铵盐的合成和缓蚀性能的研究
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作者 李霁阳 杨东元 许磊 《广东化工》 CAS 2013年第24期54-55,30,共3页
合成了新型吡啶季铵盐阳离子缓蚀剂,研究并讨论了其在炼油装置塔顶空冷器、水冷器的1000 ppm HCl^500 ppm H2S腐蚀介质中对Q235钢的缓蚀性能及其与中和有机胺、表面活性剂的配伍性。研究表明,该吡啶季铵盐对Q235钢均表现出较传统咪唑啉... 合成了新型吡啶季铵盐阳离子缓蚀剂,研究并讨论了其在炼油装置塔顶空冷器、水冷器的1000 ppm HCl^500 ppm H2S腐蚀介质中对Q235钢的缓蚀性能及其与中和有机胺、表面活性剂的配伍性。研究表明,该吡啶季铵盐对Q235钢均表现出较传统咪唑啉季铵盐好的缓蚀性能,该吡啶季铵盐添加量20 ppm时缓蚀效率可达90%以上,对Q235钢腐蚀表现出明显的抑制作用。 展开更多
关键词 吡啶季铵盐 Q235钢 缓蚀性能
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Microstructures and mechanical properties of metal inert-gas arc welded Mg-steel dissimilar joints 被引量:8
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作者 汪晓勇 孙大千 +1 位作者 殷世强 刘东阳 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第8期2533-2542,共10页
The joining of Mg alloy to steel was realized by metal inert-gas arc welding, and the weld thermal cycle characteristics and Mg-steel joints were investigated. The results show that the temperature distribution in the... The joining of Mg alloy to steel was realized by metal inert-gas arc welding, and the weld thermal cycle characteristics and Mg-steel joints were investigated. The results show that the temperature distribution in the joints is uneven. Mg alloy welds present a fine equiaxed grain structure. There exists a transition layer consisting mainly of AlFe, AlFe3 and Mg(Fe, Al)2O4 phases at Mg/steel interface, and it is the weakest link in Mg?steel joints. The welding heat input and weld Al content have the significant effect on the joint strength. The joint strength increases with increasing the heat input from 1680 J/cm to 2093 J/cm, due to promoting Mg/steel interface reaction. When weld Al content is increased to 6.20%, the joint strength reaches 192 MPa, 80% of Mg alloy base metal strength. It is favorable to select the suitable welding heat input and weld Al content for improving joint strength. 展开更多
关键词 AZ31B Mg alloy Q235 steel metal inert-gas arc welding dissimilar metal joining
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Q235钢在溶液中微弧渗碳过程的研究 被引量:1
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作者 耿亭 包晔峰 +1 位作者 蒋永锋 朱燕华 《热加工工艺》 CSCD 北大核心 2012年第10期169-171,共3页
探讨了Q235钢在溶液中快速微弧渗碳过程。通过观察渗碳过程、渗碳金相组织,借助SEM观测渗碳层形态,利用显微硬度计测试表面硬度,初步认识了溶液中快速微弧渗碳工艺的条件和过程。结果表明,在电压150 V左右,对试样微弧渗碳15 min后,试样... 探讨了Q235钢在溶液中快速微弧渗碳过程。通过观察渗碳过程、渗碳金相组织,借助SEM观测渗碳层形态,利用显微硬度计测试表面硬度,初步认识了溶液中快速微弧渗碳工艺的条件和过程。结果表明,在电压150 V左右,对试样微弧渗碳15 min后,试样表面化合物层的硬度能达到710 HV左右,约为基体硬度的4倍。 展开更多
关键词 Q235钢 微弧渗碳 电压
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一种改性HPAM在3.5%NaCl溶液中对Q235钢的缓蚀作用及缓蚀机理 被引量:2
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作者 陈国浩 王贵江 +1 位作者 姜勇 袁野 《腐蚀与防护》 CAS 北大核心 2020年第6期14-19,共6页
以功能性单体对水解丙烯酰胺(HPAM)进行改性,合成出一系列改性HPAM,测定了其黏均分子量及表观黏度,并对其结构进行了表征;通过腐蚀浸泡试验和电化学试验研究了改性HPAM在3.5%NaCl溶液中对Q235钢的缓蚀作用。结果表明:40℃、黏均分子量为... 以功能性单体对水解丙烯酰胺(HPAM)进行改性,合成出一系列改性HPAM,测定了其黏均分子量及表观黏度,并对其结构进行了表征;通过腐蚀浸泡试验和电化学试验研究了改性HPAM在3.5%NaCl溶液中对Q235钢的缓蚀作用。结果表明:40℃、黏均分子量为1300万的改性HPAM具有最佳的缓蚀性能,缓蚀率随着改性HPAM添加量的增加而增大,当添加量为500mg/L时,缓蚀率达到85.16%;改性HPAM是一种以控制阳极为主的混合型缓蚀剂,添加改性HPAM后,电极过程由活化控制转为浓差控制;改性HPAM在Q235钢表面的吸附方式为化学吸附,且符合Langmiur等温吸附模型。 展开更多
关键词 改性HPAM 3.5%NaCl溶液 缓蚀剂 Q235钢
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大蒜硫酸提取液缓蚀作用研究 被引量:2
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作者 汪军 李晓明 +4 位作者 李小军 张义新 冯辉霞 魏云 任文涛 《广东化工》 CAS 2010年第4期54-56,共3页
文章采用电化学方法,研究了用硫酸浸泡大蒜法提取的缓蚀剂对碳钢在酸洗溶液中的缓蚀作用。考察了大蒜质量分数和酸浓度对缓蚀效果的影响,实验结果表明,该大蒜提取物在酸性介质中有良好的缓蚀作用,缓蚀效率达96%以上。
关键词 大蒜提取物 酸洗 缓蚀剂 Q235钢 缓蚀性能
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Microstructure characteristics and mechanical properties of steel stud to Al alloy by CMT welding-brazing process 被引量:8
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作者 葛佳棋 王克鸿 +2 位作者 张德库 顾民乐 薛守立 《China Welding》 EI CAS 2016年第1期49-56,共8页
Cold metal transfer (CMT) welding of nickel-coated Q235 steel studs with 606l Al alloy was carried out using ER4043 as filler metal. The welding process was stable, and appearance of weld formed well without surface... Cold metal transfer (CMT) welding of nickel-coated Q235 steel studs with 606l Al alloy was carried out using ER4043 as filler metal. The welding process was stable, and appearance of weld formed well without surface defect under the parameters of welding current 121 A, welding voltage 15.4 V and welding speed 6 r/min. The microstructure of fiUer metal was analyzed by means of scanning electron microscopy. The filler metal and 6061 Al alloy were fused to form fusion welding interface, the fusion zone had a good bonding without any micro defect. The steel stud did not melt and brazing interface was formed between the filler metal and steel stud. Two different reaction layers existed in the brazing interface, the Fe2Al5 layer about 10 -12 p^m formed near the steel stud side, and the other layer was mainly composed of FeAl3. Nickel-rich zone was formed in the root toe area of the fillet weld, which was mainly composed of Al3Ni2. The tensile tests showed that the maximum shearing strength of the joints was 129 MPa. The joint was brittle fractured in the intermetallic compound layer where plenty of FeAl3 were distributed continuously. 展开更多
关键词 Q235 steel stud 6061 A1 alloy dissimilar metal joint cold metal transfer welding microstructure
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Corrosion behavior and electrochemical property of Q235A steel in treated water containing halide ions(F^-, Cl^-) from nonferrous industry 被引量:3
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作者 WANG Yun-yan LUO Yong-jian +1 位作者 XU Hui XIAO Hai-juan 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第4期1224-1234,共11页
The corrosion behaviors and electrochemical properties of Q235 A steel in the treated water containing corrosive halide anions(F-, Cl-) have been investigated with corrosion tests of static coupon and dynamic coupon t... The corrosion behaviors and electrochemical properties of Q235 A steel in the treated water containing corrosive halide anions(F-, Cl-) have been investigated with corrosion tests of static coupon and dynamic coupon testing, electrochemical measurement of open-circuit potential and linear sweep voltammetry. The results reveal that the existence of F-and Cl-ions in the simulated treated water accelerate the corrosion rate of Q235 A steel. The corrosion rate reaches maximum with F-concentration of 50 mg/L, Cl-concentration of 200 mg/L, respectively. However, Q235 A steel would passivate when an applied potential is added to the system. Meanwhile, the initiating passive potential becomes positive with F-, Cl-concentration increasing. There is a little influence of F-, Cl-concentration on the initiating passivation current density. Therefore, it is necessary to control F-, Cl-concentration in the treated water when it is recycled by the pipelines made of Q235 A steel. 展开更多
关键词 simulated water halide anions (F- Cl-) Q235A steel corrosion behavior electrochemical property
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Numerical simulation of stress distribution in Al_2O_3-TiC/Q235 diffusion bonded joints 被引量:1
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作者 沈孝芹 李亚江 +1 位作者 王娟 黄万群 《China Welding》 EI CAS 2008年第4期47-51,共5页
The distributions of the axial stress and shear stress in Al2O3-TiC/Q235 diffusion bonded joints were studied using finite element method (FEM). The effect of interlayer thickness on the axial stress and shear stres... The distributions of the axial stress and shear stress in Al2O3-TiC/Q235 diffusion bonded joints were studied using finite element method (FEM). The effect of interlayer thickness on the axial stress and shear stress was also investigated. The results indicate that the gradients of the axial stress and shear stress are great near the joint edge. The maximal shear stress produces at the interface of the Al2O3-TIC and Ti interlayer. With the increase of Cu interlayer thickness, the magnitudes of the axial stress and shear stress first decrease and then increase. The distribution of the axial stress changes greatly with a little change in the shear stress. The shear fracture initiates at the interface of the Al2O3-TiC/ Ti interlayer with high shear stress and then propagates to the Al2O3-TIC side, which is consistent with the stress FEM calculating results. 展开更多
关键词 Al2O3-TiC composite ceramic Q235 steel diffusion bonding stress distribution finite element method
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Prevention of Q235 Steel Corrosion using Waterborne Rust Inhibitor
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作者 闫镇威 KANG Mingjie +3 位作者 谭兆钧 李全德 田宝强 李帅 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2023年第1期206-211,共6页
Sorbitol,triethanolamine,sodium benzoate,boric acid,and sodium carbonate were mixed to prepare a waterborne rust inhibitor.A temperature and humidity accelerated corrosion test was applied to investigate the corrosion... Sorbitol,triethanolamine,sodium benzoate,boric acid,and sodium carbonate were mixed to prepare a waterborne rust inhibitor.A temperature and humidity accelerated corrosion test was applied to investigate the corrosion behaviour of waterborne rust inhibitor coated Q235 steel and original Q235 steel,which was carried out in a temperature and humidity test chamber(WSHW-1000)at a temperature of 80℃and humidity of 95%.Compared with the original Q235,waterborne rust inhibitor coated Q235 has better resistance to corrosion in hot and humid ambient conditions.Electrochemical impedance spectroscopy and potentiodynamic polarization were measured with a three-electrode cell in 3.5%NaCl aqueous solution on a CHI760E potentiostat/galvanostat.Molecular dynamics was simulated to verify the synergistic corrosion inhibitory mechanism of sodium carbonate and triethanolamine.The test shows that the prepared waterborne rust inhibitor can reduce the tendency of Q235 to corrosion and can also effectively reduce the corrosion rate. 展开更多
关键词 Q235 steel waterborne rust inhibitor temperature and humidity test electrochemical corrosion
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Corrosion-fatigue evaluation in Q235A steel using nonlinear Rayleigh surface waves
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作者 LI Hai-yang WANG Zhao-ba PAN Qiang-hua 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第1期97-102,共6页
This paper presents a non-destrcutive evaluation method for the evolution of corrosion fatigue of Q235A steel. Specimen surface degradation due to corrosion fatigue from the combined interaction of corrosion and cycli... This paper presents a non-destrcutive evaluation method for the evolution of corrosion fatigue of Q235A steel. Specimen surface degradation due to corrosion fatigue from the combined interaction of corrosion and cyclic loading leads to harmonic generation during Rayleigh wave propagation along the specimen surface,which allows for an early prediction of material fatigue life. The relative nonlinearity parameter β as an evaluation parameter,which is denoted as a ratio of fundamental and second-order harmonic amplitudes,is measured by using an experimental platform based on a pair of wedge transducers to launch and receive Rayleigh wave signal. Subjected to an immersion corrosion method with 10% NaCl solution and a 20 Hz cyclic loading,a corrosion-fatigue specimen was made,and its relative nonlinearity parameter was measured every 10 5 cycles until to 7 ×10^5 cycles. A measured curve of relative nonlinearity parameter versus fatigue load cycles,which is produced by surface degradation of specimen corrosion fatigue,showed an initial steady trend followed by a rapid increase. Experimental results demonstrate that corrosion fatigue results in the sudden destruction of a Q235A steel specimen and nonlinear Rayleigh surface waves measurement technique can be used to quantitatively characterize fatigue life of Q235A steel. 展开更多
关键词 corrosion fatigue nonlinear acoustic Rayleigh wave Q235 steel
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Study on Kinetics of Cathodic Reduction of Dissolved Oxygen in 3.5% Sodium Chloride Solution
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作者 LI Yongjuan ZHANG Dun WU Jiajia 《Journal of Ocean University of China》 SCIE CAS 2010年第3期239-243,共5页
Electrochemical reduction of dissolved oxygen in seawater on metals is of great importance for corrosion studies. The present paper studied cathodic reduction of dissolved oxygen on Q235 carbon steel in 3.5% sodium ch... Electrochemical reduction of dissolved oxygen in seawater on metals is of great importance for corrosion studies. The present paper studied cathodic reduction of dissolved oxygen on Q235 carbon steel in 3.5% sodium chloride (NaCl) solutions by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE). The cyclic voltammetric results demonstrated the cathodic process on Q235 carbon steel in O2-saturated 3.5% NaCl solution contains three reactions: dissolved oxygen reduction, iron oxides reduction and hydrogen evolution. The peak potential of oxygen reduction reaction (ORR) is - 0.85 V vs Ag/AgCl, 3 molL^-1 KCI. The EIS results indicated that the ORR occurring on Q235 carbon steel is a 4-electron process and that no finite diffusion is caused by the intermediate of H2O2 produced by ORR. The RDE and RRDE voltammograms confirmed the EIS results and it was found that the number of transferred electrons for ORR was nearly 4, i.e., dissolved oxygen reduced to water. 展开更多
关键词 dissolved oxygen reduction 3.5% NaCl solution Q235 carbon steel cyclic voltammetry electrochemical impedance spectroscopy rotating electrode
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3-吲唑啉酮在石油沉积水中对储油罐Q235钢缓蚀性能研究
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作者 左秀丽 谷科城 +2 位作者 伊茜 王建 鄢豪 《当代化工》 CAS 2022年第11期2592-2597,共6页
通过电化学、扫描电镜和量子计算研究3-吲唑啉酮缓蚀剂在石油沉积水中对Q235钢的缓蚀性能和机理。试验表明:3-吲唑啉酮缓蚀剂能够减缓Q235钢的腐蚀,随着温度的升高,缓蚀效果能保持不变,随着缓蚀剂浓度的增加,缓蚀效果也增加,并且为阳极... 通过电化学、扫描电镜和量子计算研究3-吲唑啉酮缓蚀剂在石油沉积水中对Q235钢的缓蚀性能和机理。试验表明:3-吲唑啉酮缓蚀剂能够减缓Q235钢的腐蚀,随着温度的升高,缓蚀效果能保持不变,随着缓蚀剂浓度的增加,缓蚀效果也增加,并且为阳极型缓蚀剂;SEM扫描电镜和量子化学计算表明3-吲唑啉酮的HOMO和LUMO主要分布在六元环与N原子上,以及与环相结合的羟基上的氧原子上,总体分布比较均匀。这说明缓蚀剂分子能够紧紧附着在金属Q235钢的表面,将腐蚀介质与金属区分开来,降低腐蚀。 展开更多
关键词 3-吲唑啉酮 Q235钢 石油沉积水 阳极型缓蚀剂
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茶渣提取物在HCl中对Q235钢的缓蚀性能研究
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作者 王皓 刘嘉奇 +3 位作者 陶爱宁 周利红 周汇兰 陈书军 《遵义师范学院学报》 2023年第5期96-99,共4页
为探究茶渣的有效利用途径,采用蒸馏水提取法制备了茶渣提取物(TRS),研究了其对Q235钢的缓蚀性能。结果表明:TRS作为一种混合型缓蚀剂,能有效抑制Q235钢在盐酸中的腐蚀,缓蚀性能随TRS浓度增加而增强,随溶液温度升高而变弱,当TRS添加量为... 为探究茶渣的有效利用途径,采用蒸馏水提取法制备了茶渣提取物(TRS),研究了其对Q235钢的缓蚀性能。结果表明:TRS作为一种混合型缓蚀剂,能有效抑制Q235钢在盐酸中的腐蚀,缓蚀性能随TRS浓度增加而增强,随溶液温度升高而变弱,当TRS添加量为2.0g/L时,其在1mol/L盐酸溶液中对Q235钢的缓蚀效率可达92.69%。 展开更多
关键词 缓蚀 茶渣 红外光谱 Q235钢 提取物
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Refilled friction stir spot welding of dissimilar Q235 low-carbon steel/5052 aluminum with equal thickness
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作者 Jian-yu Li Jia-xu shi +2 位作者 Shu-hai Chen Ji-hua Huang Shu-jun Chen 《Journal of Iron and Steel Research International》 SCIE EI CAS 2024年第10期2520-2529,共10页
The welding characteristics of 5052 aluminum alloy and Q235 low-carbon steel sheet were systematically studied by the refilled friction stir spot welding.The effects of rotation speed and pressure speed on weld formin... The welding characteristics of 5052 aluminum alloy and Q235 low-carbon steel sheet were systematically studied by the refilled friction stir spot welding.The effects of rotation speed and pressure speed on weld forming,tensile strength,and welded joint structure were analyzed in different welding modes.The results indicated two different connection modes:the chimeric mode and the non-chimeric mode.The corresponding depression depth are 2 and 2.4 mm,respectively.In the non-chimeric connection mode,the steel/aluminum metallurgical interface is a smooth transition,the hook structure is obvious,and the welding mechanism mainly depends on the mutual diffusion between atoms.However,in the chimeric mode,a hook structure will be formed at the metallurgical interface of steel and aluminum.The connection mechanism is determined by mechanical interlocking and mutual diffusion.The maximum strength value is 7.48 kN in non-chimeric mode.At this time,the spindle speed is 1300 r/min and the pressure speed is 1 mm/s.There were two types of fractures:the button fracture mode and the peel fracture mode. 展开更多
关键词 Friction stir spot welding 5052 aluminum alloy Q235 low-carbon steel Intermetallic compound Mechanical interlocking
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Q235钢在实际土壤与模拟溶液中的腐蚀行为 被引量:4
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作者 李健 苏航 +3 位作者 柴锋 陈小平 李向阳 孟惠民 《钢铁研究学报》 CAS CSCD 北大核心 2014年第12期36-41,共6页
对比分析了Q235钢在实际土壤和模拟溶液中的腐蚀行为,计算了其腐蚀失重,利用SEM和XRD方法分析了两种腐蚀介质中Q235钢的锈层形貌、物相结构及相对含量,并分析了不同介质中材料的极化曲线。结果表明:Q235钢在两种不同腐蚀介质中的腐蚀行... 对比分析了Q235钢在实际土壤和模拟溶液中的腐蚀行为,计算了其腐蚀失重,利用SEM和XRD方法分析了两种腐蚀介质中Q235钢的锈层形貌、物相结构及相对含量,并分析了不同介质中材料的极化曲线。结果表明:Q235钢在两种不同腐蚀介质中的腐蚀行为存在较大差异。Q235钢在模拟溶液中的腐蚀速率远高于实际土壤,至周期360h达到0.413mm/a,约为实际土壤的4.5倍;Q235钢在实际土壤中呈蚀斑相连长大扩展的腐蚀形貌,其腐蚀产物为α-FeOOH、γ-FeOOH、Fe3O4和Fe2O3;模拟溶液中试样为均匀腐蚀形貌,阴极过程主要受析氢控制;随腐蚀周期的延长,内锈层中生成结晶性良好的Fe3O4,降低了试样的腐蚀速率。 展开更多
关键词 土壤腐蚀 实际土壤 模拟溶液 Q235钢 锈层
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