A kind of preparation method of aluminum alloy organic amine-phenol composite sealing film and its film-forming solution
A film-forming liquid, aluminum alloy technology, applied in the direction of metal material coating process, etc., can solve the problems of different substrate properties and different treatment processes, and achieve the effect of low cost, low concentration, and easy production control.
Inactive Publication Date: 2016-01-20
GUANGXI UNIV FOR NATITIES
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Problems solved by technology
However, as we all know, the performance of the substrate is different, and the treatment process is also different. Therefore, the process of aluminum alloy anodic oxidation sealing film cannot be directly used for surface treatment of aluminum alloy after polishing.
At present, there are reports on aluminum alloy surface films, such as the Chinese patent "Aluminum alloy surface normal temperature rapid film-forming liquid and its application method" (application number 200710017506.3 application date 2007-03-15) of Xi'an University of Architecture and Technology, and the inventor's early Chinese Patent "Preparation method of aluminum or aluminum alloy trivalent chromium chemical conversion film" (application number 200710034656.5 application date 2007-03-30), these are inorganic films, and there are few reports on aluminum alloy organic sealing films, especially the use of organic aminophenols Composite film formation has not been reported yet
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[0015] figure 1 The process flow of the preparation method of the aluminum alloy organic amine-phenol composite sealing membrane of the present invention is shown, wherein the water used in the steps of establishing the degreasing bath, polishing bath, sealing bath and cleaning is deionized water.
[0016] Example 12024 aluminum alloy closure
[0017] A. Build a 450L degreasing bath: Please clean the container thoroughly before building the bath. For new containers or new production lines, first wash with 50L of 10% sulfuric acid solution, and then wash twice with deionized water, each time with 100L , and then add Henkel's degreasing agent 9KGRidoline212, then dilute to 450L with deionized water, control the pH within the range of 7 to 9, and stir evenly.
[0018] B. Build a 450L polishing bath: Please clean the container thoroughly before building the bath. For new containers or new production lines, clean them with 10% sulfuric acid solution first, and then clean them with...
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The invention discloses a preparation method of an aluminum alloy-organic aminophenol composite closing membrane, and a closing membrane-forming solution. The closing membrane-forming solution is added with o-phenylenediamine and catechol as corrosion inhibitors so that in treatment on an aluminum or aluminum alloy workpiece by the closing membrane-forming solution, the closing membrane-forming solution forms the aluminum alloy-organic aminophenol composite closing membrane on the surface of the aluminum or aluminum alloy workpiece. Compared with the single-phase hot-water closing membrane, the aluminum alloy-organic aminophenol composite closing membrane can improve aluminum alloy corrosion resistance and has corrosion resistant effects of trivalent and hexavalent chromium conversion membranes.
Description
technical field [0001] The invention relates to aluminum alloy surface treatment, in particular to a method for preparing an aluminum alloy organic amine-phenol composite closed film and a film-forming solution thereof. Background technique [0002] In order to improve the corrosion resistance of aluminum and other metals such as zinc and steel, the traditional method is to use hexavalent chromium or hot water direct sealing method. However, hexavalent chromium is toxic. In the electrical and electronic industries, the EU RoHS regulations (Restriction of Hazardous Substances, "Instructions on Restricting the Use of Certain Hazardous Components in Electrical and Electronic Equipment") prohibit the use of hexavalent chromium compounds. In order to meet the needs of environmentally friendly processes, various hexavalent chromium-free conversion coatings have been developed. Recent research involves new conversion coatings such as titanium, tungsten, tin, zinc, and rare earth s...
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IPC IPC(8): C23C22/68C23C22/66
Inventor 余会成蓝福周雷福厚谭学才韦贻春陈其峰韩燕燕梁菲萍吴刘梅
Owner GUANGXI UNIV FOR NATITIES