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Phosphating solution for aluminum product surface treatment

A technology for surface treatment and phosphating liquid, applied in the field of phosphating liquid, it can solve the problems of high labor intensity, small area of ​​flowers, turbidity, etc., and achieve the effect of high non-adhesion to molten metal and good adsorption.

Inactive Publication Date: 2015-02-18
HEFEI ZHENGTUO DECORATION MATERIALS CO LTD
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  • Abstract
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Problems solved by technology

But in the existing phosphating solution, there are some shortcomings such as turbidity, more residues generated during the phosphating process, small flower area, high temperature requirement, and waste of labor.
[0005] At present, the existing methods for treating metal surfaces not only have complicated procedures, high labor intensity (especially for the treatment of rusted metal components), low efficiency, but also pollute the environment

Method used

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Embodiment Construction

[0016] A phosphating solution for surface treatment of aluminum products, consisting of the following raw materials in parts by weight: 32-36 parts of 62% phosphoric acid, 11 parts of oxalic acid, 6 parts of acrylic acid, 5 parts of hydrofluoric acid, 6 parts of zinc dihydrogen phosphate, 2.2 parts of ammonium molybdate, 3 parts of chromium sulfate, 0.8 parts of nickel nitrate, 0.8 parts of cobalt naphthenate, 2.2 parts of tetrabasic zinc chromate, 5 parts of defoamer, 0.8 parts of dispersant, 37 parts of distilled water;

[0017] Its specific preparation method is as follows:

[0018] (1) Weigh oxalic acid, acrylic acid, hydrofluoric acid, zinc dihydrogen phosphate, ammonium molybdate, and chromium sulfate, and place them in a stirring container with a stirring speed of 100-120r / min and a temperature of 50-80°C to prepare Paste, slowly add phosphoric acid, defoamer, dispersant, and at the same time add half of the distilled water and stir until uniform, stir to dissolve compl...

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Abstract

The invention discloses a phosphating solution for aluminum product surface treatment. The phosphating solution is prepared from the following raw materials in parts by weight: 32-36 parts of 60-65% phosphoric acid, 10-12 parts of oxalic acid, 5-8 parts of crylic acid, 2-9 parts of hydrofluoric acid, 4-8 parts of zinc dihydrogen phosphate, 1.2-3.2 parts of ammonium molybdate, 2.5-3.5 parts of chromium sulfate, 0.2-1.4 parts of nickel nitrate, 0.6-1.2 parts of cobalt naphthenate, 1.5-2.8 parts of tetrabasic zinc chromate, 4.5-6.5 parts of an antifoaming agent, 0.5-1.2 parts of a dispersing agent and 35-40 parts of distilled water. The phosphating solution is simple and practical in formula. A metal workpiece is immersed in the phosphating solution, and a water-insoluble crystalline phosphate conversion coating can be deposited and formed on the surface of the metal workpiece at normal temperature. The coating layer is of a micropore structure, is firmly combined with a substrate, has good adsorbability, lubricity and corrosion resistance and high electrical insulating property, and does not stick molten metal.

Description

[0001] technical field [0002] The invention relates to the technical field of a phosphating solution, in particular to a phosphating solution for surface treatment of aluminum products. [0003] Background technique [0004] Iron and steel parts must be treated with anti-rust treatment. The usual method is to spray paint. Before painting, in order to increase the bonding strength between the coating and the steel plate, the steel parts must be phosphating before painting, so that the outside of the steel parts is formed. A honeycomb-like structure that increases bond strength. However, the existing phosphating solution has the disadvantages of turbidity, many residues generated during the phosphating process, small patch area, high temperature requirement, and waste of labor. [0005] At present, the existing methods for treating metal surfaces not only have complex procedures, high labor intensity (especially for the treatment of rusted metal components), low efficiency...

Claims

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Application Information

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IPC IPC(8): C23C22/47
CPCC23C22/47
Inventor 傅杨华
Owner HEFEI ZHENGTUO DECORATION MATERIALS CO LTD
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