Study on Acid Salt Spray Resistance of 304 Stainless Steel and Glass Sealed Shell
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摘要:为提升304不锈钢与玻璃封接壳体的耐酸性盐雾性能，采用涂覆电接触表面防护剂、真空渗锌、酸洗钝化及抛光3种方法对304不锈钢与玻璃封接壳体进行表面处理，通过酸性盐雾试验和扫描电镜对其防护效果进行了对比研究，并结合腐蚀机理分析探索最佳表面处理方法。结果表明：涂覆电接触润滑保护剂后壳体的耐酸性盐雾防护效果有限；真空渗锌处理后壳体未出现锈蚀现象，但渗锌层厚度一致性较难控制，使其应用范围受限；不锈钢酸洗钝化及抛光处理后产品表面无锈蚀，能够满足酸性盐雾试验要求，其耐酸性盐雾腐蚀性能最佳。
Abstract:In order to improve the acid resistance of 304 stainless steel and glass sealed shell to salt spray, the surface of 304 stainless steel and glass sealed shell was treated by three methods, which are coating electric contact surface protective agent, vacuum zinc infiltration and acid pickling passivation. The protective effect were compared by acid salt spray test and scanning electron microscope, and the best surface treatment method was explored based on the analysis of corrosion mechanism. The results show that the acid resistant salt spray protection effect of the product is limited after coating the electric contact lubricant. After vacuum zincification, there is corrosion of the shell, it is difficult to control the consistency of the thickness of zinc coating,which limits its application range; The surface of stainless steel after pickling,passivation and polishing has no rust, which can meet the requirements of acid salt spray test, and its acid salt spray corrosion resistance is the best.
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