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Yin W.-H.,economics and Trade Bureau of Jinchengjiang District | Yang L.-N.,Shanghai Tractor and Internal Combustion Engine Co. | Zhou Y.-G.,Nandan Country Non ferrous Metals Smelting Co. | Wei Z.-W.,Nandan Country Non ferrous Metals Smelting Co.
Corrosion and Protection | Year: 2013

Lead dioxide coating was prepared on a Ti substrate by pulsed current technique. The effect of the pulsed current density, pulsed time and relaxation time on the morphology and electrochemical properties of the coating was studied by means of scanning electron microscopy and electrochemical testing. Compared with lead dioxide fabricated by common electroplate technique, lead dioxide prepared by pulsed current technique is more dense, has no hole, shows better corrosion resisting property and more stable electrochemical properties.

Zhang F.,Shanghai JiaoTong University | Li F.,Shanghai JiaoTong University | Wang S.,Shanghai Tractor and Internal Combustion Engine Co. | Wang D.,Shanghai Tractor and Internal Combustion Engine Co. | And 2 more authors.
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2014

The research on laser lap welding of galvanized steels in automobile industry is very significant. The effects of gap on the features and mechanical properties of welding seam are analyzed. Meanwhile, the impact of setting small gap between faying surfaces on suppressing defects that caused by zinc vapor is studied and verified by experiments. The range of laser power and lap gap is also investigated. The outcome implies that for laser lap welding of HC260LAD+Z 100 MB galvanized steel sheet whose thickness is 1.35 mm, gaps exceeding 0.1 mm will suppress the defects caused by zinc vapor effectively. Penetration reaches the maximum value when the gap is about 0.15 mm. Greater laser power of 4 kW, has better tolerance on gap from 0.05~0.2 mm.

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