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　　Are cast iron pumps more resistant to corrosion than stainless steel submerged pumps? This is not entirely true. Corrosion resistance mainly depends on the specific chemical properties of the conveyed medium. 　　For example, in sulfuric acid transportation, the corrosion resistance of cast iron pump is indeed higher than that of stainless steel Submerged pump, but in the transportation of weak acid, weak alkali and salt medium, the corrosion resistance of stainless steel Submerged pump is better than that of cast iron... more