Iron powder surface coating processing method
A technology of surface coating and treatment method, applied in the field of surface coating treatment of iron powder, can solve the problems of easy brittle cracking of the coating layer, no major progress, complicated preparation process, etc. simple effect
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[0019] Example 1
[0020] The raw material iron powder is high-purity atomized iron powder, and the concentration is controlled to 0.2g / ml. A certain amount of phosphoric acid is added to acetone to prepare a phosphating solution. The concentration of phosphoric acid is controlled to 0.008g / ml, and the iron powder is added to the phosphating solution. The solution was stirred for 30 minutes at room temperature (20°C), filtered and washed with acetone three times, and then placed at 50°C to fully dry. Then take a certain amount of 3-aminopropyltriethoxysilane and add it to the mixed solution of absolute ethanol and 5% deionized water to form a silane treatment solution after hydrolysis, control the silane concentration to 0.01g / ml, and phosphatize the above The iron powder is added to the treatment solution at room temperature (20℃) and mechanically stirred for 120min, filtered and washed with absolute ethanol, and then placed at 80℃ to fully dry, to obtain the phosphate layer and...
Example Embodiment
[0021] Example 2
[0022] The raw material iron powder is iron-6.5 silicon alloy powder, and the concentration is controlled to 2g / ml. A certain amount of phosphoric acid is added to acetone to prepare a phosphating solution. The concentration of phosphoric acid is controlled to 0.01g / ml, and the iron powder is added to the phosphating solution The reaction was mechanically stirred at 30°C for 60 minutes, filtered and washed with acetone for 3 times, and then placed at 50°C to fully dry. Then take a certain amount of 3-aminopropyltrimethoxysilane and add it to the mixed solution of absolute ethanol and 5% deionized water after hydrolysis to prepare a silane treatment solution, control the silane concentration to 0.1g / ml, and add the iron phosphide The powder was added to the treatment solution with mechanical stirring at 50°C for 60 minutes, filtered and washed with absolute ethanol, and then placed at 120°C to fully dry to obtain a coated iron-silicon alloy powder with a double-...
Example Embodiment
[0023] Example 3
[0024] The raw material iron powder is carbonyl iron powder, and its concentration is controlled to 0.1g / ml. A certain amount of phosphoric acid is added to acetone to prepare a phosphating solution. The concentration of phosphoric acid is controlled to 0.002g / ml, and iron powder is added to the phosphating solution. The reaction was mechanically stirred at ℃ for 15 min, filtered and washed with acetone for 3 times and then placed at 50 ℃ to fully dry. Then take a certain amount of 3-aminopropyltriethoxysilane and add it to the mixed solution of absolute ethanol and 5% deionized water to form a silane treatment solution after hydrolysis, control the silane concentration to 0.2g / ml, and phosphatize the above The iron powder was added to the treatment solution with mechanical stirring at 70°C for 30 minutes, filtered and washed with absolute ethanol, and then placed at 100°C to be fully dried to obtain a coated carbonyl iron powder with a double-layer structure o...
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