A preparation method for preparing purple chemical conversion film on the surface of brass
A chemical conversion film and chemical conversion technology are applied in the field of preparation of corrosion-resistant and decorative protective layers on brass surfaces, which can solve the problems of easy discoloration, weak corrosion resistance, poor adhesion of color film layers, etc., and achieve low cost. , strong corrosion resistance and bonding force, simple process effect
Inactive Publication Date: 2016-11-23
SHENYANG LIGONG UNIV
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Problems solved by technology
In recent years, there have been many reports on brass with bronze, copper green, black, etc. at home and abroad, but there are still few studies on the preparation of purple film. At the same time, the colored film still has poor bonding force, easy to change color, and poor corrosion resistance. Strong and other issues
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[0019] A preparation method for preparing a purple chemical conversion film on a brass surface, which is characterized by comprising the following steps:
[0020] 1) The brass is immersed in the degreasing solution for degreasing, the degreasing temperature is 70°C, the degreasing time is 5min, and then washed with water;
[0021] 2) The brass treated in step 1) is immersed in a polishing solution for polishing, polished at room temperature for 30s, and then washed with water;
[0022] 3) The brass treated in step 2) is immersed in the activation solution for activation, activated at room temperature for 20s, and then washed with water;
[0023] 4) The brass treated in step 3) is immersed in the chemical conversion solution for coloring, the coloring temperature is 65° C., the coloring time is 5 minutes, and after coloring, washing and blowing dry, a purple chemical conversion film can be obtained on the surface of the brass.
[0024] Prepare the desired solution
[0025] 1)...
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The invention relates to a preparation method for preparing a purple chemical conversion film on the surface of yellow brass. The method comprises the following process flows: (1) submerging the yellow brass into deoiling fluid for deoiling, and then, washing with water, wherein the deoiling temperature is 60-70 DEG C, and the deoiling time is 3-5 minutes; (2) submerging the treated yellow brass into polishing fluid, polishing for 30 seconds at room temperature, and then, washing with water; (3) submerging the yellow brass, subjected to deoiling treatment, into activating fluid, activating for 10-20 seconds at room temperature, and then, washing with water; (4) submerging the treated yellow brass into chemical conversion fluid for coloring, then, washing with water, and then, carrying out blow-drying, thereby preparing the purple chemical conversion film on the surface of the yellow brass, wherein the coloration temperature is 65-70 DEG C, and the coloration time is 4-5 minutes. The method is simple in process flow and low in cost, and decoration and corrosion prevention effects can be excellently achieved.
Description
technical field [0001] The invention belongs to the technical field of surface treatment, and relates to a preparation method of a corrosion-resistant and decorative protective layer on a brass surface. technical background [0002] Copper-zinc alloy, also known as brass, has a wide range of strength and plasticity, good mechanical properties and casting properties, and is widely used in material processing, workpiece manufacturing, and handicraft production. However, ordinary binary brass is easy to be oxidized and discolored, and has poor corrosion resistance in high temperature and high humidity environment. In addition, in the field of decoration, due to the upgrading of products and the needs of export in recent years, the single color of brass is far from being able to meet the production requirements. Require. Therefore, it is often used for coloring treatment, and at the same time plays the role of decoration and anti-corrosion. [0003] Metal coloring is mainly di...
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IPC IPC(8): C23C22/52
Inventor 邵忠财刘聘张弘
Owner SHENYANG LIGONG UNIV