What material to choose carbon steel for hydrogen sulfide resistance

For hydrogen sulfide.

The risk of corrosion comes from two main sources. First, there is the corrosion loss caused by the oxidation of the material. The other is due to the hydrogen atom in hydrogen sulfide.

Corrosion cracking caused by penetration into the material matrix (SSCC, HIC, etc.).

Typically, for hydrogen sulfide environments, the latter results in greater damage. All sulfide-resistant carbon steel choices focus on how to choose a material that is resistant to sulfide stress corrosion cracking.

In general, materials that are resistant to hydrogen sulfide corrosion are selected in terms of hardness (strength), microstructure, chemical composition, and cold deformation. In general, materials suitable for hydrogen sulfide environments include, but are not limited to, 15,20 steel.

20R, 16MnR, 35CRMO, N-80, J-55, L-55, C-75, L-80, A-53, A106 (A, B, C), etc. (suitable for different limits and temperatures of different materials).

In the case of hydrogen sulfide, the risk of corrosion comes from two main sources.

One is the corrosion weight loss caused by the oxidation of the material.

The other is corrosion cracking caused by hydrogen atoms in hydrogen sulfide penetrating into the material matrix (SSCC, HIC, etc.).

In general, for the hydrogen sulfide environment, the latter will cause greater harm, and the focus of all hydrogen sulfide resistant carbon steel choices is how to choose the material to resist sulfide stress corrosion cracking.

Generally speaking, the selection of materials suitable for hydrogen sulfide environment includes but is not limited to 15 steel, 20R, 16mnr, 35CRMO, N-80, J-55, L-55, C-75, L-80, A-53, A106 (A, B, C), etc.

Coking desulfurization! Generally, 304 is sufficient!

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To expand on the information: Hydrogen sulfide is an inorganic compound with the chemical formula H s. It is an important chemical raw material, which is normally a colorless and flammable acid gas, which can be mixed with air to form a first-class mixture, which can cause combustion in case of open flame and high heat energy.

It is also an acute highly toxic substance, with rotten egg smell, low concentration of hydrogen sulfide has an effect on the eyes, respiratory system and central nervous system, inhalation of a small amount of high concentration of hydrogen sulfide can be fatal in a short time. Molecular structure: the central atom S atom adopts SP hybridization (the actual result calculated according to the bond angle is close to P hybridization), the electron pair configuration is tetrahedral shape, the molecular configuration is V-shaped, the H-S-H bond angle is, the dipole moment, and it is a polar molecule.

Due to the weak H—S bond energy, about 300 hydrogen sulfide decomposes. <>

20. Chemical composition of steel resistant to hydrogen sulfide.

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The chemical composition of 20 steel hydrogen sulfide resistance is to contain ,,, p,s in the field of fierce cave ballast. <

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Expand the information for you: Hydrogen sulfide is a Zhengsen inorganic compound with the chemical formula Hs. It is an important chemical raw material, which is normally a colorless, flammable acid gas, which can be mixed with empty shouting gas to form a first-class mixture, which can cause combustion in case of open flame and high heat energy.

It is also an acute highly toxic substance, with rotten egg smell, low concentration of hydrogen sulfide has an impact on the eyes, respiratory system and central nervous system, inhalation of a small amount of high concentration of hydrogen sulfide can be fatal in a short period of time. Molecular structure: the central atom S atom adopts SP hybridization (the actual result calculated according to the bond angle is close to P hybridization), the electron pair configuration is tetrahedral shape, the molecular configuration is V-shaped, the H-S-H bond angle is, the dipole moment, and it is a polar molecule.

Due to the weak H—S bond energy, about 300 hydrogen sulfide decomposes. <>