两种奥氏体不锈钢酸性盐雾腐蚀行为研究  

Corrosion Behavior of Two Kinds of Austenitic Stainless Steel inAcid Salt Spray Test

作　　者：石瑶 黄子琳 袁珂 SHI Yao;HUANG Zi-lin;YUAN Ke(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002

出　　处：《装备环境工程》2020年第6期51-57,共7页Equipment Environmental Engineering

摘　　要：目的研究0Cr18Ni9(钝化)不锈钢与0Cr18Ni10Ti(钝化)不锈钢在酸性盐雾条件下的腐蚀行为,为发动机零件选材及防护措施的改进提供依据。方法按GJB150.11A-2009《军用装备环境试验方法盐雾试验》进行,调节溶液p H到3.5±0.5,以24 h喷雾润湿+24 h干燥为一个循环,分别开展2(96 h)、4(192 h)、5(240 h)个循环的酸性盐雾试验。采用目视、称量、X射线衍射(XRD)、扫描电子显微镜(SEM)及能谱仪(EDS)对盐雾腐蚀后试样进行观察及分析。结果 0Cr18Ni9(钝化)与0Cr18Ni10Ti(钝化)两种奥氏体不锈钢均发生了轻微的腐蚀,主要为局部腐蚀及均匀腐蚀。结论两种金属在酸性盐雾条件下耐蚀性良好,且可满足目前海军型发动机对材料耐酸性盐雾腐蚀的要求,0Cr18Ni9(钝化)略优于0Cr18Ni10Ti(钝化)。The paper aims to study the corrosion behavior of 0Cr18Ni9 (passivated) and 0Cr18Ni10Ti (passivated) stainless steel in acid salt spray test to provide basis for selection and protection of engine parts. Based on GJB150.11A-2009 “Environ- mental Test Methods for Military Material-Salt Spray Test”, the pH of the solution was adjusted to 3.5±0.5. With 24h mist spray plus 24h drying as a cycle, two cycles (96 h), 4 cycles (192 h) and 5 cycles (240 h) of acid salt spray tests were carried out. The specimens after acid salt spray test was observed and analyzed by visual check, weighing, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). Both 0Cr18Ni9 (passivated) and 0Cr18Ni10Ti (pas- sivated) had slight corrosion in acid salt spray test. The corrosion is mostly local corrosion and uniform corrosion. Both 0Cr18Ni9 (passivated) and 0Cr18Ni10Ti (passivated) have well corrosion resistance and can meet the requirement of navy en- gine on acid salt spray corrosion resistance salt spray of materials. But 0Cr18Ni9 (passivated) is a little better than 0Cr18Ni10Ti (passivated).

关 键 词：奥氏体不锈钢 酸性盐雾试验 0Cr18Ni9(钝化) 0Cr18Ni10Ti(钝化) 腐蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]