Method for preparing nickel phosphorus alloy coating iron powder
A technology of nickel-phosphorus alloy and coated iron, which is applied in the field of preparation of nickel-phosphorus alloy coated iron powder, can solve the problems of increasing the process, difficult to control the process, difficult to keep the same passivation effect, etc., and achieves uniform coating, high resistance to The effect of improved oxidation performance and convenient operation
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Embodiment 1
[0026] 1. Preparation of plating solution, plating solution formula: nickel sulfate 27g / L, sodium hypophosphite 32g / L, citric acid 22g / L, sodium acetate 20g / L, potassium iodide 80mg / L, sodium dodecylbenzenesulfonate 1mg / L, adjust the pH value to 4.2 with sodium hydroxide;
[0027] 2. Heat the bath to 70°C;
[0028] 3. Put 3g of iron powder into the alkaline degreasing bath (Na 2 CO 3 =35g / L, Na 3 PO 4 12H 2 (O=15g / L, NaOH=7.5g / L) for chemical degreasing at 70°C, take it out after 10 minutes, and remove the grease on the surface of the iron powder with deionized water;
[0029] 4. Put the degreased iron powder into 5% dilute sulfuric acid solution for pickling for 1 min, then rinse with deionized water;
[0030] 5. Add the iron powder after pickling to the plating solution, and stir it mechanically to ensure that the temperature of the plating solution is constant at 70°C;
[0031] 6. After 2 hours of plating, take out the iron powder and rinse with deionized water;
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