钛制换热器氢腐蚀破坏失效分析[新发表的文章]

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摘要：本文针对两种典型钛制化工设备（换热器管束和筒体）的腐蚀破坏进行失效分析，采用宏观和微观腐蚀形态分析、材质成分和结构分析、金相显微组织分析等技术手段分析工业纯钛和钛钯合金腐蚀破坏的原因。分析结果表明，两种典型钛制化工设备的腐蚀破坏均为吸氢腐蚀破坏，系由钛材从环境腐蚀介质中吸氢后在基体内部形成大量脆性TiH2相而引起的脆性所致，并最终因钛材表面发生脆性粉化和剥落而导致破坏。
关键词：钛合金  换热器  氢腐蚀  失效分析
Failure Analysis of hydrogen corrosion of chemical equipments made of titanium alloy
Abstract： In this paper，the failure analyses of two chemical equipments made of titanium were analyzed. They were analyzed by means of macroscopic and microscopic analysis, chemical composition analysis, and structure analysis. The results showed that both of the two chemical equipments made of titanium failed because of hydrogen corrosion. The titanium absorbed hydrogen and led to the formation of large amount of TiH2, which caused the corrosion failure such as brittle breaking and flaking off on the surface of titanium equipments.
Key words: Titanium Alloy; Heat Exchanger; Hydrogen corrosion; Failure analysis