Corrosion behaviors of Cr₁₃Ni₅Si₂ based composite coatings prepared by laser-induction hybrid cladding

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• 作者：DengZhi Wang^a ; ^b ; Peng Li^a ; Kai Kang^a ; Chen Zhang^a ; ^c ; Jie Yin^a ; Ming Jiang^a ; ^{jm_china@mail.hust.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; QianWu Hu^a ; XiaoYan Zeng^a
• 关键词：Laser-induction hybrid cladding ; Composite coatings ; Silicide ; Corrosion
• 刊名：Surface and Coatings Technology
• 出版年：2016
• 出版时间：25 August 2016
• 年：2016
• 卷：300
• 期：Complete
• 页码：128-134
• 全文大小：1305 K

文摘

Crack-free Cr₁₃Ni₅Si₂ based composite coatings were prepared by laser-induction hybrid cladding. Corrosion resistances of the coatings were investigated by dynamic polarization, electrochemical impedance spectroscopy and immersion tests in 1 N HCl solution. Results indicate that the coatings have better corrosion resistance than the stainless steel 1Cr18Ni9Ti, and the corrosion mechanism of the coatings is micro-galvanic corrosion between the Cr₁₃Ni₅Si₂ and the Ni₋ based solid solution. Compact passive film was formed on the surface of the coating owing to its high content of Cr and Si, which can effectively protect the Cr₁₃Ni₅Si₂ based composite coatings from severe chemical attacking.