Title:
METHOD FOR PREPARING METAL SURFACE CHEMICAL CONVERSION FILM
Document Type and Number:
WIPO Patent Application WO/2022/033192
Kind Code:
A1
Abstract:
Disclosed is a more economical and environmentally-friendly method for preparing a metal surface chemical conversion film, belonging to the technical field of metal anticorrosive coatings. In the present invention, an aluminum alloy is mainly used as a matrix to prepare a zeolite membrane by means of a solid-phase method and a steam-assisted method. In the preparation process of the solid-phase method, a seed crystal is coated onto the metal surface by means of an electrostatic spraying technology to finally realize the successful preparation of the zeolite membrane in raw material dry powder. In the preparation process of the steam-assisted method, a dry gel is also coated onto the metal surface by means of an electrostatic spraying technology to finally realize the conversion of the zeolite membrane in steam. The solid-phase method and the steam-assisted method involved in the present invention can effectively avoid the problems of solution validity period and waste liquid treatment involved in the traditional preparation method of a chemical conversion film such as dipping and spraying. In the present invention, an electrostatic spraying technology is used for coating a solid raw material onto the metal surface for reaction, such that the film-forming efficiency is high, and the film layer is denser. The popularization of the present invention has good social, environmental and economical benefits.
Inventors:
TONG XIAOQIANG (CN)
Application Number:
PCT/CN2021/102114
Publication Date:
February 17, 2022
Filing Date:
June 24, 2021
Export Citation:
Assignee:
UNIV CIVIL AVIATION CHINA (CN)
International Classes:
C01B39/04; C23C26/00
Foreign References:
| CN113186527A | 2021-07-30 | |||
| CN109280406A | 2019-01-29 | |||
| CN1051334A | 1991-05-15 | |||
| US20060093806A1 | 2006-05-04 |
Other References:
LU XIAO-FEI: "Synthesis of Microstructure Controlled MFI-tvpe Zeolite Films and Their Related Application", CHINESE DOCTORAL DISSERTATIONS FULL-TEXT DATABASE, 20 April 2019 (2019-04-20), pages 1 - 170, XP055900297, DOI: 10.27461/d.cnki.gzjdx.2019.000745
CHANGJEAN WEN-CHYUAN, CHIANG ANTHONY S.T., TSAI TSENG-CHANG: "Anti-corrosion zeolite film by the dry-gel-conversion process", THIN SOLID FILMS, vol. 529, 1 February 2013 (2013-02-01), AMSTERDAM, NL , pages 327 - 332, XP055900302, ISSN: 0040-6090, DOI: 10.1016/j.tsf.2012.09.037
CHANGJEAN WEN-CHYUAN, CHIANG ANTHONY S.T., TSAI TSENG-CHANG: "Anti-corrosion zeolite film by the dry-gel-conversion process", THIN SOLID FILMS, vol. 529, 1 February 2013 (2013-02-01), AMSTERDAM, NL , pages 327 - 332, XP055900302, ISSN: 0040-6090, DOI: 10.1016/j.tsf.2012.09.037
Attorney, Agent or Firm:
TIANJIN HEZHIHUI INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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