Inhibitors bimetallic corrosion

The use of soluble inhibitors as a means of controlling bimetallic corrosion presents many technical problems. Apart from the fact that this method is limited in applicability to recirculating systems, efficient anodic inhibitors, such as chromates, are frequently quite specific in their action and so certain bimetallic couples, such as the Al-Cu couple in chloride solutions, are... 

To prevent galvanic corrosion of bimetallic structures, the concentration of inhibitor should be increased as compared with protection of a single metal structure. 

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