OALib Journal期刊
ISSN: 2333-9721
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两种nial基合金在酸腐蚀工况下的磨损特性
Keywords: 金属材料,nial-2.5ta-7.5cr合金,nial-2.5ta-7.5cr-1b合金,h2so4,腐蚀磨损,磨损机制
Abstract:
?研究了nial-2.5ta-7.5cr-x(0,1)b合金在5%h2so4溶液中的腐蚀磨损特性,结果表明:在酸腐蚀工况下nial-2.5ta-7.5cr-1b合金的耐蚀性能优于nial-2.5ta-7.5cr合金,易钝化成膜,静置腐蚀速率为0.007mg/(cm2h1),钝化电流密度为0.299(macm-2),自然腐蚀电位为-0.213v,表现出良好的耐酸腐蚀性能及稳定性。物质膜完整地覆盖在nial-2.5ta-7.5cr-1b合金的磨损表面,抑制了腐蚀对磨损的加速作用,nial-2.5ta-7.5cr-1b合金比nial-2.5ta-7.5cr合金的腐蚀磨损率减小了2-8倍。nial-7.5cr-2.5ta-1b合金的磨蚀,受控于腐蚀磨损和完整的物质膜的保护作用。nial-2.5ta-7.5cr合金的磨蚀机制,受控于腐蚀磨损和磨粒磨损。
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