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系统地论述酸性环境对产生硫化物应力裂缝(SSC)的敏感程度很重要。通过分析SSC氢脆裂现象,建立了一个预测系统,可根据公式由硫化氢浓度和氢离子浓度预算出进入钢材中氢的含量。从中发现,无论pH值和硫化氢浓度为多少,SSC失效应力随钢材中氢的含量的增加而下降;低于临界氢含量值时,不产生硫化物应力裂缝。钢材屈服强度(YS)的提高,会降低其临界氢含量值。
It is important to systematically state how sensitive the acidic environment is to sulfide stress cracks (SSC). By analyzing the phenomenon of hydrogen embrittlement in SSC, a predictive system was established to calculate the hydrogen content in the steel from the hydrogen sulfide concentration and the hydrogen ion concentration according to the formula. It was found that SSC failure stress decreased with the increase of hydrogen content in steel regardless of the pH value and concentration of hydrogen sulphide, and no sulfide stress cracking occurred below the critical hydrogen content. Steel yield strength (YS) increase, will reduce the value of the critical hydrogen content.