Corrosion-resistant zeolite coatings by in situ crystallization

A new class of inorganic corrosion-resistant coating, zeolite coating, was prepared on aluminum alloys and shown to be highly corrosion resistant even in strong acid and pitting aggressive media. The coating also has good adh esion, wear-resistance, and paint compatibility. The in situ crystallizatio n coating deposition process is clean and can coat surfaces of complex shap es and in confined space. Therefore, it can potentially serve as an environ mentally friendly, alternative corrosion-resistant coating for aluminum all oys. The coating also appears to be generally applicable to other metals, i ncluding steel. (C) 2001 The Electrochemical Society. All rights reserved.