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| CRITERIA TO AVOID SULPHIDE STRESS CRACKINGPROVIDED BY EFC AND ITS VERIFICATION |
| Yiliang Zhang;Linsheng Li;Mu Wang |
| 北京工业大学机电学院 |
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Cite this article:
Yiliang Zhang; Linsheng Li; Mu Wang. CRITERIA TO AVOID SULPHIDE STRESS CRACKINGPROVIDED BY EFC AND ITS VERIFICATION. J Chin Soc Corr Pro, 2002, 22(3): 138-142 .
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Abstract 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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Received: 11 October 2000
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