摘要
对发生泄漏的不锈钢U型波纹管补偿器的宏观失效特征、微观失效特征、金相、腐蚀介质进行试验分析。波纹管失效的主要原因为点蚀、应力腐蚀和腐蚀疲劳造成的开裂。产生腐蚀的主要原因是通过波纹管出口端环与主管道的缝隙进入波纹管的腐蚀介质中Cl-和SO24-的质量分数较高。
A test analysis is made on macro-failure and micro-failure characteristics , metallography and corrosion mediums of U-type stainless steel bellows type expansion joints leaked. The crack caused by pitting, stress corrosion and corrosion fatigue is responsible for the bellows failure. The main corrosion reason is higher mass fraction of Cl^- and SO~ 2- 4 in corrosion mediums that enter into the bellows through the bellows outlet and the gap of main pipeline.
出处
《煤气与热力》
2005年第6期13-16,共4页
Gas & Heat
关键词
供热管道
波纹管补偿器
腐蚀失效
点蚀
应力腐蚀
腐蚀疲劳开裂
heat-supply pipeline
bellows type expansion joint
corrosion failure
pitting
stress corrosion
corrosion fatigue crack
