Stability of electroplated titanium diboride coatings in high-temperature corrosive media

The corrosion behaviour of molybdenum and steel materials, protected by electrochemically plated TiB2 coatings, in contact with liquid aluminium alloys and liquid glass in air has been studied. The corrosion performance tests followed by characterization of the treated samples by optical microscopy, SEM, elemental EDX analysis, have shown high corrosion resistance of the coatings to the liquid metal. However, the coating was not stable in contact with molten glass in an oxidative atmosphere at temperatures higher as 750-800 degrees C. Dissolution of the corrosion products in the melt facilitates the destruction of the coating. (C) 2009 Elsevier Ltd. All rights reserved.