根据欧洲腐蚀协会(EFC)关于防止SSC的失效准则，通过恒载 拉伸及三点弯曲试验确定了国产低合金高强钢WH610D2的适用环境为含H2S 100×10-6 的酸性溶液.同时进行了模拟压力容器现场工况条件的焊板系列试验，对EFC准则进行了 有效性验证.结果表明EFC准则有很好的应用价值.
In accordance with the criteria to avoid SSC provid ed by European Federation of Corrosion (EFC),the constant tensile load testing a nd three-point bend testing for low alloy and high strength steel WH610D2 were carried out and an acceptable environment of H2S-containing 100×10-6 so lution was identified.To verify the validity of the EFC criteria,a series of wel ded plate testing simulating the anticipated field conditions of pressure vessel s was conducted and the results show that the EFC criteria can be used well in s ervices.The testing plate used includes both welded state and heat-treated state .The working stresses were produced by loading with bolts.The welding residual s tresses and working stresses were measured by PSM-2F X-ray analyzer.Three sets of testing plate were conducted respectively in three different H2S content so lutions:1500×10-6,500×10-6,100×10-6.Upon termination of exp osure after one and two months,the testing plates were examined to determine whe ther cracks occurred.The examinations showed that,on the plates in the solution s of H2S content being 1500 ×10-6 and 500×10-6,many cracks occur red; and on the plate in the solution of H2S content being 100×10-6,no crack was examined.So the results show that the EFC criteria can be used well in services.
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