对某厂未作焊后热处理的液化石油气储罐进行Ｈ＿２Ｓ腐蚀挂片检测表明，腐蚀产物主要为ＦｅＳ．经过分析认为，只要严格控制Ｈ＿２Ｓ含量，即使焊缝存在轻度的焊接残余应力（＜．６σ＿Ｙ），在两三年的运行期内并不一定发生应力腐蚀问题。 H_2S corrosion coupons tests on a liquefied petroleum gas tank which has not been post-welded heat-treated by a factory show that the corrosion products are mainly FeS. The analysis shows that, as long as the H 2 S content is strictly controlled, the problem of stress corrosion does not necessarily occur during the two or three year operation even though the weld has slight welding residual stress (<.6σ_Y).