CAJ | 학술논문

为提高0Cr18Ni9Ti奥氏体不锈钢在特殊应用环境的耐酸腐蚀性能，采用双辉等离子渗金属技术在不锈钢基体表面渗锆，对渗锆合金层的相结构进行检测分析，将奥氏体不锈钢基体试样和表面渗锆试样分别在0.5 mol/L H2 SO4溶液、0.5 mol/L HNO3溶液、0.5 mol/L HCl溶液进行电化学腐蚀对比试验。结果表明：在 H2 SO4溶液、HNO3溶液、HCl 溶液中，不锈钢基材的相对腐蚀速度分别是渗锆合金层的2.18倍、9.73倍、24.43倍；不锈钢基体表面腐蚀较为严重，而渗锆合金层表面仅出现轻微的局部腐蚀坑。奥氏体不锈钢表面渗锆后，渗锆合金层中合金元素呈梯度分布，且腐蚀时在表面形成了一层致密的氧化锆钝化膜，因而其抗酸腐蚀性能相对基体大幅提升，在 HCl 溶液比在 H2 SO4溶液和 HNO3溶液中耐蚀效果更明显。
위제고0Cr18Ni9Ti오씨체불수강재특수응용배경적내산부식성능，채용쌍휘등리자삼금속기술재불수강기체표면삼고，대삼고합금층적상결구진행검측분석，장오씨체불수강기체시양화표면삼고시양분별재0.5 mol/L H2 SO4용액、0.5 mol/L HNO3용액、0.5 mol/L HCl용액진행전화학부식대비시험。결과표명：재 H2 SO4용액、HNO3용액、HCl 용액중，불수강기재적상대부식속도분별시삼고합금층적2.18배、9.73배、24.43배；불수강기체표면부식교위엄중，이삼고합금층표면부출현경미적국부부식갱。오씨체불수강표면삼고후，삼고합금층중합금원소정제도분포，차부식시재표면형성료일층치밀적양화고둔화막，인이기항산부식성능상대기체대폭제승，재 HCl 용액비재 H2 SO4용액화 HNO3용액중내식효과경명현。
A zirconium modified surface alloying layer was prepared on 0Cr18Ni9Ti stainless steel by double-glow plasma sur-face alloying technology to improve the acid resistance of stainless steel in the special environment,and the structure of Zr-alloyed layer was examined,then an electrochemical corrosion comparison test of stainless steel substrate and Zr-alloyed lay-er samples were taken in 0.5 mol/L H2 SO4 ,0.5 mol/L HNO3 and 0.5 mol/L HCl solution.The results show that the cor-rosion rate of stainless steel sample are 2.18,9.73,24.43 times as the Zr-alloyed layer in H2 SO4 ,HNO3 ,HCl solution;Surface corrosion of stainless steel sample is more serious,and only minor localized corrosion pitting is on the surface of Zr-alloyed layer sample.Alloying elements in the Zr-alloyed layer presents gradient distribution and a dense zirconium oxide passivation film is formed on its surface,so acid corrosion resistance of Zr-alloyed layer is improved significantly compared to the stainless steel substrate and it′s more obvious in HCl solution than in the HNO3 ,H2 SO4 solution.