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; atmospheric corrosion 1 Introduction In view of the widespread use of zinc, as metallic sheet or zinc coatings, it was desirable to study its corrosion behaviour in the wide variety of atmospheres... Initial atmospheric corrosion of zinc in presence of Na2SO4 and (NH4)2SO4 QU Qing(屈 庆)1, LI Lei(李 蕾)1, BAI Wei(白 玮)2, YAN Chuan-wei(严川伟)3 1. Department of Chemistry, Yunnan University, Kunming......
to the experimental result. 3.2 Morphology and microstructure of coatings The obtained electroplate zinc coating shows light gray color. The appearance is compact and uniform as shown in Fig.1, which... of zinc coating Table 2 Electrochemical parameters of coatings Fig.4 Morphology of electroless nickel plating on zinc coating Fig.5 Polarization curves of coatings in 3.5% NaCl 4 Conclusions......
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of the coating are finer and the microstructures of the outer surface of the coatings are zigzag at the cathodic density of 0.2-0.5 A/dm2. The content of nano metallic zinc particles in the coating decreases... coating is 1-5 mm. The visible crystals in Fig.1(a) are phosphate compounds of the coatings and they are usually more than 10 mm in a normal phosphating process. The metallic zinc particles cannot......
INFLUENCE OF SILICON IN STEELS ON GALVANIZED COATINGS G. Kong1,Q.Y. Xu1,J.T. Lu1,C.S. Che1,J.H. Chen1 (1.College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China) Abstract:After steel sheets (0.37wt%Si) pre-electroplated with a thin layer of pure Fe were immersed in molten zinc for various time, the change in the microstructure......
zinc phosphate coatings was improved. Key words:Rare Earth Nitrate (REN); phosphate coating; aluminum alloy; accelerator; ,nucleation agent; [全文内容正在添加中] ...Zinc phosphating of 6061-Al alloy using REN as additive ZHANG Xiaolin1,ZHANG Mingming2,ZHANG Shenglin2 (1.School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou......
J. Cent. South Univ. Technol. (2010) 17: 760-764 DOI: 10.1007/s11771-010-0553-x Solvent extraction of zinc from zinc sulfate solution LONG Huai-zhong(龙怀中)1, CHAI Li-yuan(柴立元)1, QIN Wen-qing(覃文庆)2...; Abstract: The extraction of zinc from zinc sulfate solution was investigated, using 20% saponified D2EHPA as an extractant and 260# sulfonate kerosene......
artificially. It is important to know that Cl- causes the premature failure of zinc alloys and coatings. PERSSON et al [2] have done some work to research the corrosion processes of zinc confined... Trans. Nonferrous Met. Soc. China 22(2012) 228-240 Shot noise analysis on corrosion behavior of zinc alloy (ZnAl4Cu1) under dry-wet cycles CHEN An-na1, CAO Fa-he1, LIU Wen-juan1, ZHENG Li-yun1......
J. Cent. South Univ. (2012) 19: 9-16 DOI: 10.1007/s11771-012-0965-x Influence of zinc on electrochemical discharge activity of Mg-6%Al-5%Pb anode WANG Nai-guang(王乃光), WANG Ri-chu(王日初), PENG Chao-qun...: Mg-6%Al-5%Pb (mass fraction) anodes with different contents of zinc were prepared by melting and casting. The electrochemical discharge behavior of these anodes in 3.5% NaCl solutions was investigated......
Dechlorination of zinc dross by microwave roastingWEI Ya-qian(魏亚乾)1, 2, 3, PENG Jin-hui(彭金辉)1, 2, 3, ZHANG Li-bo(张利波)1, 2, 3, JU Shao-hua(巨少华)1, 2, 3, XIA Yi(夏仡)4, ZHENG Qin(郑勤)1, 2, 3, WANG Ya-jian..., Kunming 650093, China;4. Research Centre for Analysis and Measurement,Kunming University of Science and Technology, Kunming 650093, China)Abstract:Traditional treatments of zinc dross have many......
