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纳微米硼酸盐添加剂与含磷添加剂的摩擦化学机理
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作者 乔玉林 徐滨士 +2 位作者 马世宁 刘维民 薛群基 《润滑与密封》 CAS CSCD 北大核心 2002年第2期29-31,共3页
利用四球试验机考察了纳微米硼酸盐添加剂与含磷抗磨添加剂复配体系的摩擦学性能,以及摩擦改进剂对其摩擦学性能的影响,分析研究了摩擦表面膜的组成和化学状态。结果表明:纳微米硼酸盐添加剂与磷型添加剂复配体系产生对抗效应;而摩擦改... 利用四球试验机考察了纳微米硼酸盐添加剂与含磷抗磨添加剂复配体系的摩擦学性能,以及摩擦改进剂对其摩擦学性能的影响,分析研究了摩擦表面膜的组成和化学状态。结果表明:纳微米硼酸盐添加剂与磷型添加剂复配体系产生对抗效应;而摩擦改进剂可以使其复配体系的抗磨减摩性能产生协同效应。其主要原因是摩擦改进剂可以明显地减缓元素P和Fe的反应速度,从而大大降低腐蚀(氧化)磨损,四球磨斑表面变得明显光滑,元素P、N的含量增高。 展开更多
关键词 纳微米硼盐酸添加剂 含磷添加剂 摩擦化学 表面分析 磨损机理
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新型半胱胺盐酸盐添加剂对畜禽应激的生理调控作用研究 被引量:2
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作者 徐金先 姜树林 陆天水 《饲料研究》 CAS 2005年第8期17-21,共5页
以动物应激的发生、发展过程以及对畜禽生产性能的影响为理论基础,阐述了半胱胺对抗畜禽应激可能的机制,总结了应激条件下半胱胺盐酸盐添加剂(CT2000)在畜禽生产上的应用研究结果,为半胱胺抗应激作用提供理论和实践依据。
关键词 半胱胺盐酸添加剂 畜禽应激 生理调控作用 饲料 反映机制 调控机制
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食品添加剂盐酸的安全生产与质量控制要点
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作者 孔亮 咸立颖 《中国氯碱》 CAS 2013年第12期24-25,共2页
介绍了食品添加剂盐酸的生产工艺、安全控制要点、贮运环境要求及使用ICP发射光谱法测定其中的砷、铅含量的注意事项。
关键词 食品添加剂盐酸 安全生产 质量控制 ICP
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添加己酸和盐酸对玉米秸秆青贮饲料质量的影响 被引量:19
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作者 席兴军 韩鲁佳 +1 位作者 原慎一郎 甘利雅弘 《中国农业大学学报》 CAS CSCD 北大核心 2002年第6期54-60,共7页
通过测定盐酸、己酸处理的玉米秸秆青贮饲料的 p H值、含水率、有机酸含量及组成、干物质消失率、NDF瘤胃降解率、干物质回收率和青贮饲料化学成分 ,研究了盐酸、己酸的处理对玉米秸秆青贮饲料质量的影响。试验结果表明 :在玉米秸秆青... 通过测定盐酸、己酸处理的玉米秸秆青贮饲料的 p H值、含水率、有机酸含量及组成、干物质消失率、NDF瘤胃降解率、干物质回收率和青贮饲料化学成分 ,研究了盐酸、己酸的处理对玉米秸秆青贮饲料质量的影响。试验结果表明 :在玉米秸秆青贮饲料中添加盐酸 ,降低了青贮饲料中乳酸占总酸的比例和干物质回收率 ,并使青贮饲料的细胞壁物质含量显著增加 ,明显降低了玉米秸秆青贮饲料的质量 ;己酸的添加对青贮饲料质量无显著影响 (P>0 .0 5 ) ;盐酸和己酸的共同处理除了明显改善青贮饲料的色泽、气味和质地外 ,还可明显降低青贮饲料中 OB,ADF和 ADL的含量 (P>0 .0 5 ) 。 展开更多
关键词 玉米秸秆 青贮饲料质量 盐酸添加剂 己酸添加剂
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Review of gold leaching in thiosulfate-based solutions 被引量:13
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作者 Feng XIE Jun-nan CHEN +1 位作者 Jian WANG Wei WANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第11期3506-3529,共24页
Numerous non-cyanide leaching lixiviants have been developed,among which thiosulfate is considered the most promising alternative to cyanide due to its non-toxicity,low price,high leaching rate and excellent character... Numerous non-cyanide leaching lixiviants have been developed,among which thiosulfate is considered the most promising alternative to cyanide due to its non-toxicity,low price,high leaching rate and excellent characteristics in dealing with carbonaceous and copper-bearing gold ores.The traditional copper−ammonia−thiosulfate system has been studied extensively.However,with many years of process development,there are still some problems and challenges with this gold leaching system.A series of studies using nickel-,cobalt-and ferric-based catalyst to substitute copper have been conducted with the purpose of reducing the consumption of thiosulfate.A variety of non-ammonia thiosulfate leaching systems including oxygen−thiosulfate,copper−thiosulfate,copper−EDA−thiosulfate,ferric−EDTA−thiosulfate,and ferric−oxalate−thiosulfate leaching systems have been also developed to eliminate the potential side-effect of ammonia.In this review,the basic theory and process development of some main gold leaching systems based on thiosulfate solutions were systematically summarized to illustrate the research status on thiosulfate leaching process.The potential effects of various additives such as organic ligands containing amino,carboxyl or hydroxy functional groups on gold thiosulfate leaching were described in detail.The potential opportunity and challenge for promoting the industrial development of thiosulfate-based gold leaching systems were also discussed. 展开更多
关键词 THIOSULFATE GOLD LEACHING ADDITIVES
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Synergistic effect of additives on electrodeposition of copper from cyanide-free electrolytes and its structural and morphological characteristics 被引量:8
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作者 R.SEKAR 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第7期1665-1676,共12页
Electrodeposition of acid copper plating on mild steel substrate is tedious due to the galvanic displacement reaction ofcopper on mild steel.This can be avoided by using a proper complexing agent,because the complexin... Electrodeposition of acid copper plating on mild steel substrate is tedious due to the galvanic displacement reaction ofcopper on mild steel.This can be avoided by using a proper complexing agent,because the complexing agent tuned the potential ofnoble direction to less noble direction by complex formation.In this paper,environment friendly electrodeposition of copper fromnon-cyanide electrolyte using sodium gluconate as complexing agent was investigated in alkaline medium.The effects of additivessuch as1,2,3-benzotriazole,sodium lauryl sulphate,PEG8000and saccharin were studied.These additives are found to reduce thegrain size,grain boundaries and improve surface morphology of the copper deposits.Also they improve the throwing power of thedepositing electrolytes and hardness of deposits.The electrodeposited copper coatings were characterized by X-ray diffractiontechnique.XRD results indicate that the electrodeposited copper shows polycrystalline and face centered cubic structure.The crystalsize was calculated by XRD and AFM analysis.Among these additives studied,the mixture of benzotriazole and sodium laurylsulphate acts as the best additive.A uniform pore-free surface observed under SEM and AFM results reveal the grain refining broughtabout by the additives. 展开更多
关键词 synergistic effect GLUCONATE ADDITIVE atomic force microscopy ELECTRODEPOSITION COPPER
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Microstructure and crystallographic characteristics of nanocrystalline copper prepared from acetate solutions by electrodeposition technique 被引量:3
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作者 R.SEAKR 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第6期1423-1430,共8页
Methane sulphonic acid is an alternative electrolyte for conventional sulphuric acid for copper deposition.Theelectrodeposition of copper from eco-friendly acetate-based electrolytes consisting of copper acetate,sodiu... Methane sulphonic acid is an alternative electrolyte for conventional sulphuric acid for copper deposition.Theelectrodeposition of copper from eco-friendly acetate-based electrolytes consisting of copper acetate,sodium acetate and methanesulphonic acid was dealt.Thamine hydrochloride(THC),saccharin and4-amino-3-hydroxynaphthalene1-suphonic acid were used asadditives in depositing electrolytes.The cathode current efficiency was calculated using the Faraday’s law.Metal distrbution ratio ofthe solutions was determined using Haring?Blum cell.These additives impact the surface morphology of deposited copper films bydowngrading,the grain size was analyzed by scanning electron microscopy(SEM)and X-ray diffiraction technique.XRD patternacquired for electrodeposited copper film shows polycrystalline and face centered cubic structure(FCC).The crystal size of thecopper film was calculated using the Debye?Scherrer’s equation.The crystal size revealed that deposits produced from additivecontaining electrolytes exhibited the lowest grain size.Texture coefficient analysis studies revealed that all copper film deposits arepolycrystalline and the crystals are preferentially oriented and parallel to the surface.A uniform and pin-hole free surfacemorphology and grain refining were brought about by the additives. 展开更多
关键词 ACETATE copper electrodeposition ADDITIVES
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Effects of additives on zinc electrodeposition from alkaline zincate solution 被引量:6
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作者 Liang YUAN Zhi-ying DING +2 位作者 Shi-jun LIU Wei-fa SHU Ya-ning HE 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第7期1656-1664,共9页
The effects of additives on the surface and cross-sectional morphologies of zinc deposits on iron substrate from alkalinezincate solution were characterized by scanning electron microscope(SEM).The cathodic reaction m... The effects of additives on the surface and cross-sectional morphologies of zinc deposits on iron substrate from alkalinezincate solution were characterized by scanning electron microscope(SEM).The cathodic reaction mechanisms under variousconcentrations of additives were investigated using cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS)techniques.It is found that with increasing the additive A content in the bath solution,the nucleation overpotential(NOP)value isobviously increased and the inhibition effect is strengthened.This may be mainly due to the adsorption of additive A on the cathodicelectrode surface,which can cover the active sites and block the discharge reduction.The results of EIS analysis indicate that therate-determining step of zinc electrodeposition process is changed from mixed control step into electrochemical reduction step in thepresence of additive A.However,any quantity of additive B has little effect on the NOP value and the inhibition effect is not obvious.Furthermore,addition of additive A and additive B at the same time displays the strongest inhibition effect and shows a strongsynergism because of their co-adsorption on the cathodic electrode surface. 展开更多
关键词 ELECTRODEPOSITION ZINC ADDITIVES alkaline zincate solution morphology
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Stability of [BMIM]HSO_4 for using as additive during zinc electrowinning from acidic sulfate solution 被引量:1
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作者 张启波 华一新 《Journal of Central South University》 SCIE EI CAS 2012年第9期2451-2457,共7页
The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic sulfate solution was investigated by cyclic voltammetry, electrochemical impeda... The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic sulfate solution was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. Compared with the traditional industrial additives, gelatine and gum arabic, [BMIM]HSO4 has more excellent chemical and thermal stabilities. The inhibition effects of gelatine and gum arabic on the zinc electrocrystallization are observed to markedly weaken due to their part degradation after 12 h longtime successive electrolysis and high temperature (90 ℃) treatments. In contrast, the activity of [BMIM]HSO4 is practically unaffected after 24 h longtime successive electrolysis and high temperature treatments. These results are corroborated with the corresponding morphological analysis of the cathodic deposits. 展开更多
关键词 zinc electrowirming ionic liquid additive STABILITY electrochemical measurement morphology
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