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cathodic inhibitor

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cathodic inhibitor [kə′thäd·ik in′hib·əd·ər]
(chemical engineering)
A compound, such as calcium bicarbonate or sodium phosphate, which is deposited on a metal surface in a thin film that operates at the cathodes to provide physical protection over the entire surface against corrosive attack in a conducting medium.
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Cathodic inhibitors, such as inorganic salts of magnesium and manganese, suppress corrosion at the cathode by forming insoluble deposits with hydroxyl ions in neutral environments.
Anticorrosive coatings: a review by Sorensen, P.A.; Kiil, S.; Dam-Johansen, K.; Weinell, C.E. / JCT Research
In terms of corrosion protection, chromate is well documented as an anodic and cathodic inhibitor (51-54) and, on aluminum, cerium ions act as cathodic inhibitors, (26,55) suggesting that electrochemical inhibition may also play a part in the greater degree of protection offered by the conversion coatings.
Underfilm corrosion on polyurethane-coated aluminum alloy 2024-T3 ... by Glenn, A.M. / JCT Research
 
 
 
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