摘要
采用宏观检验、化学成分分析、水质检测、金相检验等方法发酵罐渗漏盘管进行分析，检测结果表明由于冷却水Cl-含量严重超标，管材Cr含量偏低，弯管处受机械冲刷等因素发生点蚀穿孔和晶间腐蚀导致发酵罐盘管出现初期渗漏，局部补焊致使盘管强应力分层、鼓包，发生缝隙腐蚀，导致盘管泄漏失效。
Abstract
Failure fermenter coil was analyzed by macroscopic view, chemical analysis, water analysis and metallographic examination. The result showed that pitting and intergranular corrosion was happened because of the overstandard content of Cl- in cooling water, the low content of Cr and mechanic erosion on elbow, and lead to the initial leakage of coil. Layering, bulge and crevice corrosion was occurred due to the local welding, and caused leakage failure.
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