Corrosion mechanism and protective measures of the top system of the fractionation tower of the hydrogenation unit
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What are the corrosion mechanisms and protective measures for the fractionation tower top system of the diesel hydromodification unit of the hydrodeacidification unit and the gasoline hydrorefining unit?
Low-temperature hydrogen sulfide corrosion, currently only corrosion inhibitors can be injected
besides: Replace materials and desulfurize raw materials.
Injecting corrosion inhibitors will do the trick. It is too expensive to invest in changing equipment.
Hydrorefining process equipment mainly causes corrosion in the aqueous environment of H2S. Theoretically, it is generally believed that corrosion in the aqueous environment of hydrogen sulfide can be divided into forms such as hydrogen bubbling, sulfide stress corrosion, and elemental sulfur corrosion.