| 316不锈钢/WC-Co涂层在锌液中的腐蚀 |
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| 引用本文： | 王文俊,林均品,王艳丽,林志,陈国良.316不锈钢/WC-Co涂层在锌液中的腐蚀[J].航空材料学报,2006,26(4):56-60. |
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| 作者姓名： | 王文俊 林均品 王艳丽 林志 陈国良 |
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| 作者单位： | 北京科技大学,新金属材料国家重点实验室,北京,100083 |
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| 摘 要： | 研究了经高速火焰喷涂(HVOF)的316不锈钢WC-Co涂层在锌液中的腐蚀行为,包括腐蚀速度、界面组织形貌和成分的变化.结果表明,WC-Co涂层在锌液中的腐蚀表现为沿裂纹的腐蚀.涂层中的缺陷造成裂纹源,在锌液和热喷涂过程留下的残余热应力的作用下,发生裂纹扩展,形成沿裂纹的腐蚀.铬和铝的扩散能力都比锌强,在产生裂纹的初期,铬和铝将优先锌扩散到裂纹中.如果适当改善喷涂工艺,增加涂层的致密度,可以延长涂层的使用寿命.
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| 关 键 词： | 液锌腐蚀 316不锈钢/WC-Co 热镀锌 HVOF |
| 文章编号： | 1005-5053(2006)04-0056-05 |
| 修稿时间： | 2005年8月12日 |
The Corrosion of 316 Stainless steel/WC-Co Coating in Liquid Zinc |
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| WANG Wen-jun,LIN Jun-pin,WANG Yan-li,LIN Zhi,CHEN Guo-liang.The Corrosion of 316 Stainless steel/WC-Co Coating in Liquid Zinc[J].Journal of Aeronautical Materials,2006,26(4):56-60. |
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| Authors: | WANG Wen-jun LIN Jun-pin WANG Yan-li LIN Zhi CHEN Guo-liang |
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| Abstract: | The microstructure and corrosion behaviours of 316 stainless steel/ WC-Co coating by high velocity oxy-fuel(HVOF) in liquid zinc which contained small amount of aluminium(less than 0.2 wt%)were studied.Experiment results showed that cracks appeared in coating because that residual stress built up during thermal spraying caused by improper spraying conditions and liquid zinc acted on the defects in coating.We observed that not only zinc but also chromium and aluminium diffusion into the WC-Co coating along the cracks.At the beginning of corrosion,chromium and aluminium preferential diffused into WC-Co coating.Increasing density of coating by improving technique of HVOF,the liquid zinc corrosion resistance of WC-Co coating could be enhanced. |
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| Keywords: | liquid zinc corrosion 316 stainless steel /WC-Co Galvanizing HVOF |
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