Abstract
Corrosion phenomena arising from the contact of dissimilar metals have been studied in acid aqueous solutions. Galvanic corrosion of mild steel coupled with stainless steel or gun-metal increased relative with the flow velocity or pH, but decreased in proportion to the weight loss by corrosion due to bimetallic coupling. The galvanic corrosion of cast steel coupled with stainless steel was neglegible in flowing ordinary river water. Cathodic protection of mild steel by zinc was more effective as the pH value became lower. The galvanic corrosion of mild steel was increased by contact with aluminum alloys. No dangerous galvanic corrosion was produced in coupling stainless steels and copper alloys.
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