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I. Core corrosion mechanism of acidic water tanks: The medium inside acidic water tanks contains large amounts of corrosive impurities such as H₂S, NH₃, and Cl⁻. Wet hydrogen sulfide corrosion is the main type of corrosion that occurs; the hydrogen atoms generated by this corrosion can easily penetrate the coating on the tank walls, leading to widespread hydrogen blistering and peeling of the coating. Localized pitting and thinning of the coating may also occur in some areas. II. Mainstream anti-corrosion technical solutions: Proper material selection. It is advisable to give priority to special steels resistant to wet hydrogen sulfide corrosion. Alternatively, a composite structure consisting of carbon steel with a corrosion-resistant lining can be used, thereby meeting the requirements of relevant material standards such as NACE MR0103. For surface coating protection, specialized anti-corrosion coatings such as modified epoxy resins, sprayed polyureas, and epoxy phenolic resins can be used. These materials have strong adhesion and resistance to acid and alkali corrosion, enabling them to completely isolate the tank walls from corrosive substances. Process anti-corrosion control involves reducing the levels of chlorine and sulfur in crude oil through upstream electrodialysis treatment, controlling the pH value of acidic water media, and adding appropriate corrosion inhibitors to such media in order to reduce the overall corrosion rate. Electrochemical protection is combined with cathodic protection techniques, often using the sacrificial anode method, to further suppress the electrochemical corrosion of the tank wall metal and significantly extend the service life of the equipment.