Al2O3基热化学反应法陶瓷涂层制备及耐蚀性能

Alumina matrix ceramic coatings prepared by thermochemical reaction method and study on its corrosion resistance

采用热化学反应法在Q235钢表面制备具有保护性的Al2O3基陶瓷涂层。X射线衍射分析结果表明:陶瓷涂层在600℃有新相产生,增强了涂层与基体的结合力。扫描电镜结果表明:陶瓷涂层比较均匀致密,涂层与基体之间已无明显界限,涂层与基体结合良好。浸泡腐蚀试验结果表明,陶瓷涂层显著的提高了基体在各种腐蚀介质中的抗腐蚀能力。

The protective alumina matrix ceramic coatings are prepared on stainless steel by thermochemical reaction method. Its XRD analysis indicates that the solidified coating could make the new ceramic phase at the temperature 600℃,the binding forces of the ceramic coating and the matrix are enhanced.The result of scanning electron microscopy indicates the ceramic coating is dense.Also,there were no obvious boundry between the coating and the matrix.And the binding strength between the coating and the matrix is very high. Immersion corrosion test results show that the ceramic coating significantly improves the corrosion resistance of matrix in various corrosive media.