What is the failure mode for Hydrogen Stress Corrosion?

My personal guess is stress corrosion caused by hydrogen; hydrofluoric acid also causes strong corrosion. I’m not sure what the temperature and concentration are

Are there steels resistant to HIC? Hydrogen-induced corrosion?

HIC-Hytrogen Induced Corrosion and Hydrogen Stress Corrosion must be different failure mechanisms. If these two types of corrosion are to be distinguished from a professional perspective, how should it be translated? Thank you!

Hydrogen stress corrosion is also known as the hydrogen embrittlement effect. It is a type of intergranular corrosion

So what should Hydrogen Induced Cracking (HIC) be translated as?

HIC should refer to hydrogen-induced cracking, a form of corrosion that occurs without the need for stress. Hydrogen Stress Corrosion – I think “hydrogen-induced stress corrosion” is a more appropriate translation; in the case of academic papers, it can be determined based on the content.

I’m sorry; there was a mistake in my question. It should be Hydrogen Stress Cracking. This failure mode is described in Chapter 5, Section 5.1.2.4 of API 571 under the heading “Hydrogen Stress Cracking-HF”. Its definition states that Hydrogen Stress Cracking is a type of environmental cracking that can occur on the surface of high-strength low-alloy steels and carbon steels, due to highly localized areas of high hardness in the weld metal and heat-affected zone, as a result of exposure to aqueous HF acid environments. I apologize for the inconvenience this has caused; please forgive me!

Inspired by everyone’s comments, I read again carefully the definitions of these two failure modes: 1. Hydrogen Stress Cracking – Hydrogen Stress Cracking is a type of environmental cracking that can occur on the surface of high-strength low-alloy steels and carbon steels, due to highly localized areas of high hardness in the weld metal and heat-affected zone, as a result of exposure to aqueous HF acid environments. 2. Hydrogen Induced Cracking (HIC) – Hydrogen bubbles can form at various depths beneath the surface of the steel, either in the middle of the plate or near welds. In some cases, adjacent bubbles that are at slightly different depths may develop cracks that connect them together. The cracks linking these bubbles often have a stair-step appearance; hence, HIC is sometimes referred to as “stepwise cracking” (Figures 5-36, 5-37, and 5-38). To summarize: (1) These two failure modes are both caused by exposure to specific environmental conditions; HIC results from a wet H2S environment, where sulfide corrosion generates hydrogen atoms that penetrate the metal. Under certain conditions, this hydrogen cannot escape from the steel, leading to the formation of hydrogen bubbles. Dense hydrogen bubbles can easily lead to the formation of cracks, namely HIC. This type of cracking can occur without any stress. It is possible to compare this with another similar failure mode under the same conditions, namely SOHIC (Stress Oriented Hydrogen Induced Cracking). As the name suggests, this type of cracking occurs only in the presence of stress. I believe that HIC cannot be considered stress corrosion cracking, whereas SOHIC is a type of stress corrosion cracking. (2) Hydrogen stress cracking occurs in an HF medium environment. Hydrogen Stress Cracking is also known as stress corrosion cracking. To illustrate this, let’s look at another type of cracking that occurs in a wet H2S environment: SSC (Sulfide Stress Cracking). Its definition is as follows: Sulfide Stress Cracking (SSC) refers to the cracking of metals under the combined effect of tensile stress and corrosion in the presence of water and H2S. SSC is a form of hydrogen stress cracking that results from the absorption of atomic hydrogen generated by the sulfide corrosion process on the metal surface. Based on its definition and mechanism of occurrence, SSC can be considered a type of stress corrosion cracking. SSC and Hydrogen Stress Cracking-HF represent the same type of failure mode; the difference is that in SSC, the hydrogen atoms come from sulfide corrosion in a wet H2S environment, whereas in Hydrogen Stress Cracking-HF, the hydrogen atoms originate from HF acid. If there are any misunderstandings, please ask experts to correct them! Thank you!