Hydrogen Stress Corrosion 翻译过来是哪一种失效模式? 受大家启发，我又仔细读了一下这两种失效模式的定义： 1. hydrogen stress cracking-hydrogen stress cracking is a form of environmental cracking that can initiate on the surface of high strength low alloy steels and carbon steels with highly localized zones of high hardness in the weld metal and haz as a result of exposure to aqueous hf acid environments. 2.hydrogen induced cracking (hic)-hydrogen blisters can form at many different depths from the surface of the steel, in the middle of the plate or near a weld. in some cases, neighboring or adjacent blisters that are at slightly different depths (planes) may develop cracks that link them together. interconnecting cracks between the blisters often have a stair step appearance, and so hic is sometimes referred to as “stepwise cracking” (figure 5-36, figure 5-37 and figure 5-38). 鄙人梳理了一下： （1）两种失效模式分别为特定介质环境造成的开裂，hic为湿h2s环境，其产生的原因是该环境下硫化物腐蚀产生氢原子渗入金属，在一定条件下形成氢气而不能从钢中逸出，产生氢鼓包。密集氢鼓包极易形成裂纹，即hic。这种开裂无需应力（stress）便可产生。可以对比在相同环境下的另外一种类似的失效模式sohic（stress oriented hygrogen induced cracking），从名字上不难看出，该开裂形式需要应力的帮忙才能发生。本人认为hic不能成为应力腐蚀开裂，而sohic是一种应力腐蚀开裂。 （2）hydrogen stress cracking 为hf介质环境。hydrogen stress cracking 为应力腐蚀开裂，为了说明这句话，我们来看另外一个在湿h2s环境中产生的第三种开裂形式 ssc （sulfide stress cracking），其定义描述如下：sulfide stress cracking (ssc) is defined as cracking of metal under the combined action of tensile stress and corrosion in the presence of water and h2s. ssc is a form of hydrogen stress cracking resulting from absorption of atomic hydrogen that is produced by the sulfide corrosion process on the metal surface. 从定义和发生机理可知ssc为应力腐蚀开裂。 而ssc和hydrogen stress cracking-hf 是同种失效模式，不同的是 ssc的氢原子来自湿h2s环境下的硫化物腐蚀，而hydrogen stress cracking-hf 的氢原子来自 hf酸。 如有理解不正确之处，请专家指正！ 谢谢！查看更多
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