A high-temperature corrosion-resistant phosphating solution
A technology of corrosion resistance and phosphating solution, which is applied in the coating process of metal materials, etc. It can solve the problems of insufficient adhesion of phosphating film, weak corrosion resistance, and limited material range, etc., and achieve good blackness and firm adhesion , the effect of a wide range of materials
Inactive Publication Date: 2016-04-06
BENGBU FUWOTE WHEEL MFG TECH
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Problems solved by technology
The existing phosphating solution has a limited range of materials for workpieces, and the formed phosphating film has insufficient adhesion, poor corrosion resistance, and poor stability in high-temperature environments.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] A high-temperature corrosion-resistant phosphating solution, a mixed solution prepared from the following components, the weight of each component in each liter of mixed solution is:
[0030] 80% phosphoric acid 425g
[0033] Citric acid 12.5g
[0035] Nitric acid 5g
[0036] Nickel nitrate 5g
[0037] Chromic acid 2.2g
[0038] Polyvinyl alcohol 3g
[0039] Sodium hydroxymethylcellulose 2g
[0040] The balance is water.
[0041] When working: mix the above phosphating solution stock solution with water at a ratio of 1:15 to make a working solution,
[0042] First, pour water into the phosphating tank to 60% of the effective volume of the phosphating tank, weigh the required amount of the phosphating solution of this embodiment and pour it into the phosphating tank to fully stir to make a working solution, and adjust the process range of the working solution to the total acidity: ...
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The invention provides a high-temperature corrosion-resistant phosphating solution. The phosphating solution is a mixture comprising the following components by weight in per liter mixture: 320-330g of 80% phosphoric acid, 120-125g of zinc oxide, 5-7g of sodium molybdate, 12-13g of citric acid, 100-150g of zinc nitrate, 4-6g of nitric acid, 4-6g of nickel nitrate, 2.0-2.5g of chromic acid, and the balance of water. The phosphating solution provided by the invention can treat a variety of metal workpiece materials with a short working time. The phosphating film formed on the surface of the workpieces is thick and dense and has the characteristics of good adhesion, good blackness, high corrosion resistance and high stability. The phosphating solution can be widely used for motors, gears, a variety of high strength carbon steels, alloy steel works and the like, and is suitable to be used in a high temperature environment with a stable operation.
Description
technical field [0001] The invention relates to the field of metal surface pretreatment, in particular to a high-temperature corrosion-resistant phosphating solution. Background technique [0002] Phosphating is a commonly used pre-treatment technology. The main purpose of phosphating is to provide protection for the base metal and prevent the metal from being corroded to a certain extent; it is used as a primer before painting to improve the adhesion and corrosion resistance of the paint film layer. ; Anti-friction lubrication in metal cold working process. The material range of workpieces treated with the existing phosphating solution is not wide, the adhesion of the formed phosphating film is not enough, the corrosion resistance is not strong, and the stability in high temperature environment is poor. Contents of the invention [0003] The invention provides a high-temperature corrosion-resistant phosphating solution. The metal workpieces treated by the phosphating sol...
Claims
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IPC IPC(8): C23C22/43
Inventor 年君
Owner BENGBU FUWOTE WHEEL MFG TECH