Phosphorization processing liquid for surface of carbon steel and nickel plating enclosure method
A surface phosphating and phosphating treatment technology, which is applied in the direction of superimposed layer plating, metal material coating process, coating, etc., can solve the problems of sealing and no one reports, carbon steel protection is rarely reported, and achieves easy The effect of purchasing, fast film forming speed and short nickel plating time
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Embodiment 1
[0045] In this example, the formulation of the phosphating solution is: ZnO 5.5g / L, PO 4 3- 23g / L, NiSO 4 ·6H 2 O 8.6g / L, guanidine nitrate 0.6g / L, sodium nitrate 20g / L, Ce 4+ 0.6g / L, the above compound was dissolved in deionized water to prepare 100 ml of phosphating solution, and the pH value of the phosphating solution was adjusted to 2.7-2.9 with NaOH solution.
[0046] The formula of the nickel plating solution used is: NiSO 4 ·6H 2 O 240g / L, NiCl 2 ·6H 2 O 23g / L, H 3 BO 3 25g / L, 0.65g / L saccharin, 0.32g / L 1,4-butynediol, 0.16g / L sodium lauryl sulfate, dissolve the above compounds in deionized water, and prepare 250ml nickel plating solution , The pH value of the nickel plating solution is adjusted to 4.0-4.5 with NaOH solution.
[0047] Polish the surface of the carbon steel sheet with No. 1-6 metallographic gauze paper, then put the test piece into acetone and ultrasonically clean it for 10 seconds, and rinse the surface with deionized water; then immerse the ...
Embodiment 2
[0050] In the present embodiment, the formula of the nickel plating solution that adopts is: NiSO 4 ·6H 2 O 250g / L, NiCl 2 ·6H 2 O 30g / L, H 3 BO 330g / L, 0.6g / L saccharin, 0.3g / L 1,4-butynediol, 0.1g / L sodium lauryl sulfate, dissolve the above compounds in deionized water, and prepare 250ml nickel plating solution , The pH value of the nickel plating solution is adjusted to 4.0-4.5 with NaOH solution.
[0051] The formula of the phosphating solution adopted, the pretreatment process of the carbon steel sheet, the phosphating treatment process, and the nickel plating sealing process are exactly the same as those of the above-mentioned embodiment 1.
[0052] The phosphating film is gray black, the film layer is uniform and dense, and the film weight is 3.78g / m 2 . The copper sulfate spot corrosion test result is 145 seconds; the adhesion of the phosphating film reaches the first grade. Soaked in NaCl with a mass fraction of 3.5%, the corrosion current density was changed ...
Embodiment 3
[0054] In the present embodiment, the formula of the nickel plating solution that adopts is: NiSO 4 ·6H 2 O 255g / L, NiCl 2 ·6H 2 O 36g / L, H 3 BO 3 38g / L, 0.55g / L saccharin, 0.27g / L 1,4-butynediol, 0.06g / L sodium lauryl sulfate, dissolve the above compounds in deionized water, and prepare 250ml nickel plating solution , The pH value of the nickel plating solution is adjusted to 4.0-4.5 with NaOH solution.
[0055] The formula of the phosphating solution adopted, the pretreatment process of the carbon steel sheet, the phosphating treatment process, and the nickel plating sealing process are exactly the same as those of the above-mentioned embodiment 1.
[0056] The phosphating film is gray black, the film layer is uniform and dense, and the film weight is 4.02g / m 2 . The copper sulfate spot corrosion test result was 134 seconds; the adhesion of the phosphating film reached the first grade. Soaked in NaCl with a mass fraction of 3.5%, the corrosion current density was ch...
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