Al-Zn-In-Si合金在NaCl溶液中的小孔腐蚀行为

研究了溶液中Ｃｌ－浓度和温度对Ａｌ－Ｚｎ－Ｉｎ－Ｓｉ和Ａｌ－Ｚｎ－Ｉｎ－Ｓｉ－Ｍｇ合金小孔腐蚀行为的影响,并利用电子探针对蚀孔进行形貌观察和线扫描分析。结果表明：Ｃｌ－浓度和温度变化对合金的阳极极化行为和孔蚀性能有较大影响;从孔蚀行为看,作为牺牲阳极,经加镁改性的合金较未加镁合金更佳。蚀孔出现在富Ｉｎ、Ｓｉ点周围,Ｃｌ－浓度较低时蚀孔底部的富Ｉｎ、Ｓｉ＂岛状物＂在浓度较高时逐渐溶解脱落,Ｉｎ、Ｓｉ在孔边缘富集。     

Al－Zn－In－Si合金在NaCl溶液中的小孔腐蚀行为

研究了溶液中Ｃｌ－浓度和温度对Ａｌ－Ｚｎ－Ｉｎ－Ｓｉ和Ａｌ－Ｚｎ－Ｉｎ－Ｓｉ－Ｍｇ合金小孔腐蚀行为的影响，并利用电子探针对蚀孔进行形貌观察和线扫描分析。结果表明：Ｃｌ－浓度和温度变化对合金的阳极极化行为和孔蚀性能有较大影响；从孔蚀行为看，作为牺牲阳极，经加镁改性的合金较未加镁合金更佳。蚀孔出现在富Ｉｎ、Ｓｉ点周围，Ｃｌ－浓度较低时蚀孔底部的富Ｉｎ、Ｓｉ＂岛状物＂在浓度较高时逐渐溶解脱落，Ｉｎ、Ｓｉ在孔边缘富集。     

锌铁合金在3.5%NaCl溶液中的腐蚀行为

研究了熔炼所得Ｚｎ－Ｆｅ合金在３．５％ＮａＣｌ溶液中的腐蚀电化学行为。分两个含铁量区段０－１％和１％－１０％考究了Ｚｎ－Ｆｅ合金的开路电位和线性极化电阻，并用ＳＥＭ观察腐蚀前后的表面形貌。探讨了Ｆｅ含量对合金腐蚀行为产生的影响及其作用机理。     

常用牺牲阳极合金在NaCl溶液中的接触腐蚀行为

研究了作为牺牲阳极材料的ＭｇＡｌＺｎＭｎ、ＡｌＺｎＩｎＳｉＭｇ和ＺｎＡｌＣｄ合金与Ａ３钢偶接时，溶液中Ｃｌ－浓度和电偶对中阴阳极面积比变化对三种合金接触腐蚀行为的影响。偶对阳极电偶电流密度ｊｇ随Ｃｌ－浓度增大而增大，ｊｇ与面积比成正比关系。偶对电偶电势Ｅｇ随Ｃｌ－浓度增大和面积比减小向负向变化。当偶对中阴极金属材料为３０２不锈钢和紫铜时，ｊｇ随Ｃｌ－浓度增大有不同的变化趋势。     

硅镇静钢热浸镀Zn－Ni合金

研究了硅镇静钢在Ｚｎ－０．０９％Ｎｉ合金镀液热镀后镀层的组织结构、耐盐雾腐蚀性能，并研究Ｚｎ－０．０９％Ｎｉ合金镀液对锌锅材料的腐蚀作用。结果表明，镀液中加入０．０９％Ｎｉ以后，镀层中的ζ相层减簿，晶粒细化，Ｎｉ富集在ζ相柱状晶的晶界上；Ｚｎ－Ｎｉ合金镀层的耐盐雾腐蚀寿命是纯锌镀层的２倍；Ｚｎ－Ｎｉ合金镀液能减缓对锌锅的腐蚀作用。     

添加元素对Ti－Ta合金耐蚀性的影响

采用失重法和电化学测试研究了Ａｌ、Ｍｏ、Ｚｒ合金添加元素对Ｔｉ－Ｔａ合金在高温浓ＨＮＯ３溶液中耐蚀性的影响以及溶液中Ｒｕ３＋的作用。结果表明：在Ｔｉ－Ｔａ合金中加入Ａｌ、Ｍｏ元素，则降低合金的耐蚀性能；添加Ｚｒ，合金的抗腐蚀性能有所提高；溶液中的Ｒｕ３＋可以加速所研合金的钝化，提高合金的抗蚀能力。电化学测试结果与腐蚀试验完全一致。     

添加元素对Ti—Ta合金耐蚀性的影响

采用失重法和电化学测试研究了Ａｌ、Ｍｏ、Ｚｒ合金添加元素对Ｔｉ－Ｔａ合金在高温浓ＨＮＯ３溶液中耐蚀性的影响以及溶液中Ｒｕ＾３＋的作用。结果表明：在Ｔｉ－Ｔａ合金中加入Ａｌ、Ｍｏ元素，则降低合金的耐蚀性能；添加Ｚｒ，合金的抗腐蚀性能有所提高；溶液中的Ｒｕ＾３＋可以加速所研合金的钝化，提高合金的抗蚀能力。电化学测试结果与腐蚀试验完全一致。     

NaCl溶液中铝合金表面膜的交流阻抗研究

通过测量Ａｌ－Ｚｎ－Ｉｎ－Ｓｉ－Ｍｇ合金在不同浓度ＮａＣｌ溶液中的交流阻抗谱图，研究了Ｃｌ＾－浓度和泡时间不同对铝合金表面膜阻抗的影响。结果表明：随溶液中Ｃｌ＾－浓度增加，表面电阻Ｒｔ减小，而表面电容Ｃｄ增大；Ｒｔ和Ｃｄ随浸泡时间的变化，视Ｃｌ＾－浓度不同，有不同的变化趋势。     

Al－1．6％Si镀层和55％－Al－Zn－1．6％Si合金镀层的缝隙腐蚀

应用电化学技术研究了Ａｌ－１．６％Ｓｉ镀层和５５％Ａｌ－Ｚｎ－１．６％Ｓｉ合金镀层在３％ＮａＣｌ溶液中的缝隙腐蚀历程。试验表明５５％Ａｌ－１．６％Ｓｉ合金镀层耐缝隙腐蚀优于Ａｌ－１．６％Ｓｉ镀层；钝化处理后，两类镀层的缝隙腐蚀孕育期延长，缝内外偶合电流减小，耐缝隙腐蚀性能有较大提高。     

ICP-AES法测定金合金中的杂质元素

研究了Ａｕ－Ｎｉ（（Ｙ、Ｇｄ）、Ａｕ－Ｃｕ、Ａｕ－Ｎｉ－Ｃｕ、Ａｕ－Ｃｕ－Ｎｉ－Ｚｎ（Ｍｎ）合金中的杂质元素（Ｐｂ、Ｓｂ、Ｂｉ、Ａｓ、Ｓｎ、Ｆｅ、Ａｌ、Ｚｒ、Ｂｅ、Ｖ、Ｔｉ、Ｉｎ）用Ｙ作载体的共沉淀分离富集方法。富集物转成盐酸溶液后用ＩＣＰ－ＡＥＳ法测定,试液中共存元素间的干扰用等效浓度法校正。取试样１２５克时分析范围００００４％～０２０％。ＲＳＤ一般不超出±１０％。     

Evaluation of corrosion behaviour of a new class of Pb‐free solder materials (Sn‐In‐Zn)

In view of the need for a lead‐free drop in replacement for the widely used 40Pb‐60Sn near eutectic solder, new Sn‐In‐Zn based alloys with substantially the same melting point have been developed. The corrosion resistance and the influence of zinc content on electrochemical behaviour of some special alloys Sn‐In‐Zn in 3% NaCl solution has been investigated using electrochemical techniques. The good resistance of this ternary system is confirmed. In decreasing dissolution rate, they are ranked as follows: 40Pb‐60Sn, Sn‐10.6In‐27Zn, Sn‐11In‐23Zn and Sn‐13In‐12Zn. The increase of zinc content induces a decrease of corrosion resistance of ternary Sn‐In‐Zn alloys. So, the Sn‐In‐Zn system with low indium and zinc concentrations might be a good candidate for solder materials and present a good corrosion resistance.     

Structure and microhardness of rapidly solidified foils of binary indium alloys

Structure of indium and binary indium-based alloys obtained by rapid solidification has been investigated. In the rapidly solidified foils of indium and its binary alloys with tin, lead, bismuth, zinc, and antimony (to 0.6 at %), there is formed a (101) texture, and in the alloys that contain a higher concentration of antimony, an (001) texture. The foils of the alloys that contain to 4 at % bismuth, lead, and cadmium and to 8 at % tin are single-phase. In the foils of the alloys containing zinc and antimony, dispersed particles of zinc and indium antimonide are precipitated.     

电镀锌基合金的耐蚀性

近年来,在表面处理方面,由于锌基合金呈现出很多优良的性能,特别是高的防护性,已越来越受到人们的青睐。对电镀锌基合金（主要是锌与铁族形成的合金）的性能进行了综述,并重点讨论了锌基合金的耐蚀性。     

锡、锌对铜合金耐腐蚀性的影响

通过在纯铜中添加Sn、Zn元素铸造试样,采用阳极极化测定法研究在弱酸(pH值为6)、弱碱性(pH值为8)溶液中Sn、Zn两元素对铜合金腐蚀行为的影响。试验结果显示,含5%Sn的铜合金在弱酸性溶液中能形成更加致密和稳定的钝化膜,从而提高铜合金的耐蚀性;在弱碱性溶液中,Sn、Zn对提高铜合金的耐蚀性作用不明显。     

锌合金粉在KOH溶液中析氢行为的研究

采用气雾法制备Zn-In,Zn-Pb,Zn-Bi,Zn-Al合金粉,利用收集气体的办法测定了各种合金粉在KOH溶液中的腐蚀速度,确定了In,Pb,Bi,Al四种元素与Zn分别形成合金的最佳含量,随后研究了In,Bi,Al三种金属元素与Zn形成的四元合金的析氢行为。     

Corrosion and corrosion test methods of zinc coated steel sheets on automobiles

The effect of zinc and zinc alloy coated steel sheets on perforation corrosion in actual automobiles and the relevant accelerated corrosion test methods were studied. The main factor affecting corrosion in the crevice of lapped panels was the coating weights of zinc and zinc alloys rather than the type of coating. Perforation corrosion process of galvanized steel in the crevice of lapped portion in automobiles was divided in four stages. Based on the analysis of corrosion in actual automobiles, a Perforation Corrosion Index, PCI for lapped steel panels was proposed. Assuming PCI for various accelerated corrosion test methods, the corrosion resistance of various types of coated steel sheets in actual environments was evaluated.     

锌在KOH溶液中的腐蚀电化学行为

用电化学方法研究了锌在浓ＫＯＨ溶液中的电化学行为，得出了锌在浓碱液中的电化学反应机理。利用弱极化曲线拟合法得出了锌的腐蚀速度与ＫＯＨ浓度的关系。     

Behaviour of zinc in electropolished and etched Al-Zn alloys and effect on corrosion potential

The enrichments of zinc developed in binary, solid solution Al-0.3at.%Zn, Al-0.4at.%Zn and Al-1at.%Zn alloys by electropolishing and alkaline etching are examined using Rutherford backscattering spectroscopy and medium energy ion scattering with additional interest in how such enrichments affect the corrosion potentials of the alloys. During alkaline etching in 0.1 M sodium hydroxide solution, significant enrichments of zinc arise in the alloy, similar to that achieved by an anodizing treatment. However, enrichment is unusually low following electropolishing in perchloric acid solution. Contrary to the effect of enriched copper in Al-Cu alloys, zinc enrichment has minor influence on the corrosion potentials of etched alloys in ammonium pentaborate solution, which remain roughly within ±100 mV of those of non-enriched alloys.     

Corrosion mechanism of model zinc-magnesium alloys in atmospheric conditions

Recently, superior corrosion properties of zinc coatings alloyed with magnesium have been reported. Corrosion behaviour of model zinc-magnesium alloys was studied to understand better the protective mechanism of magnesium in zinc. Alloys containing from 1 to 32 wt.% magnesium, pure zinc, and pure magnesium were contaminated with sodium chloride and exposed to humid air for 28 days. Composition of corrosion products was analyzed using infrared spectroscopy (FTIR), ion chromatography (IC), and Auger electron spectroscopy (AES). The exposure tests were completed with scanning Kelvin probe (SKP) and electrochemical measurements. Weight loss of ZnMg alloys with 1-16 wt.% magnesium was lower than that of pure zinc. Up to 10-fold drop in weight loss was found for materials with 4-8 wt.% Mg in the structure. The improved corrosion stability of ZnMg alloys was connected to the presence of an Mg-based film adjacent to the metal surface. It ensured stable passivity in chloride environment and limited the efficiency of oxygen reduction.