Title: Low-temp aluminum-rare earth cemented inorganic ceramic coating and process thereof
Application Number: 91106263 Application Date: 1991.10.11
Publication Number: 1071466 Publication Date: 1993.04.28
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C23C10/50,C23C28/00,C23D5/00
Applicant(s) Name: Metal Corrosion and Protection Inst., Chinese Acad Address: 110015
Inventor(s) Name: Chen Chongwei, Wang Weilin
Attorney & Agent: ZHU GUANGLIN
Abstract:
     This invention refers to a technological process for preparation of a corrosion-resistant and inorganic coat for metal. The coat on metal surface is constituted by two layers, namely, a "low temperature aluminizing" layer and a rare-earth inorganic ceramic layer which is compounded with the former. The low temperature aluminizing technology uses ferroaluminium powder as filler, aluminium powder as penatrant, and aluminium trichloride as catalyst. The aluminizing temperature is 500-570 deg.C. and maintained for 6-24 hrs. After aluminizing, the metal surface is washed with acetone or carbon tetrachloride, and then is coated with rare-earth ceramic solution. When it is dried, it is put into electric furnace for setting, and taken out for cooling.
Time: 9