High corrosion resistance nickel-tin-phosphorus alloy plating liquid
A high corrosion resistance, alloy technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problem of poor corrosion resistance and wear resistance of the coating, low phosphorus content in the coating, and stable plating solution It can achieve the effect of strong wear resistance, low corrosion potential and uniform thickness
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[0021] Example 1
[0022] A high corrosion resistance nickel-tin-phosphorus alloy plating solution, each liter of solution contains:
[0023] NiSO 4 ·6H 2 O 10g,
[0024] NaH 2 PO 2 ·H 2 O 20g,
[0025] SnCl 4 ·3H 2 O 5g,
[0026] CH 3 COONa 10g,
[0027] Compound hydroxy carboxylic acid complexing agent 10g,
[0028] Composite hydroxy carboxylic acid accelerator 0.060g,
[0029] Pb 2+ 0.001g, the remainder is water, the pH value of the solution is 4.5, and the complex hydroxycarboxylic acid complexing agent is composed of the following components by weight percentage: 50% lactic acid, 50% citric acid; The acid accelerator is composed of the following components in weight percentage: 8% glycine, 3% propionic acid, and 89% adipic acid.
[0030] Coating performance index
[0031] Ni 86.10wt%
[0032] Sn 0.50wt%
[0033] P 13.40wt%
[0034] Porosity (15μm) None
[0035] Microhardness 1120HV
[0036] Corrosion potential 400mV vs. SCE,
[0037] Artificial seawater imme...
Example Embodiment
[0040] Example 2:
[0041] A high corrosion resistance nickel-tin-phosphorus alloy plating solution, each liter of solution contains:
[0042] NiSO 4 ·6H 2 O 20g,
[0043] NaH 2 PO 2 ·H 2 O 40g,
[0044] SnCl 4 ·3H 2 O 20g,
[0045] CH 3 COONa 30g,
[0046] Complex hydroxy carboxylic acid complexing agent 20g,
[0047] Complex hydroxy carboxylic acid accelerator 0.125g
[0048] Pb 2+ 0.0015g, the balance is water, the pH value of the solution is 4.8, and the complex hydroxycarboxylic acid complexing agent is composed of the following components by weight percentage: lactic acid 65%, potassium citrate 35%; The carboxylic acid accelerator is composed of the following components in weight percentage: glycine 16%, propionic acid 8%, and adipic acid 76%.
[0049] Coating performance index:
[0050] Ni 85.57wt%
[0051] Sn 0.85wt%
[0052] P 13.58wt%
[0053] Porosity (15μm) None
[0054] Microhardness 1180HV
[0055] Corrosion potential 350mV vs. SCE,
[0056] Artifici...
Example Embodiment
[0059] Example 3:
[0060] A high corrosion resistance nickel-tin-phosphorus alloy plating solution, each liter of solution contains:
[0061]NiSO 4 ·6H 2 O 25g,
[0062] NaH 2 PO 2 ·H 2 O 40g,
[0063] SnCl 4 ·3H 2 O 25g,
[0064] CH 3 COONa 30g,
[0065] Compound hydroxy carboxylic acid complexing agent 25g,
[0066] Composite hydroxy carboxylic acid accelerator 0.150g,
[0067] Pb 2+ 0.002g, the balance is water, the pH value of the solution is 5.2, and the complex hydroxycarboxylic acid complexing agent is composed of the following components in weight percentage: 60% lactic acid, 40% sodium citrate; The hydroxy carboxylic acid accelerator is composed of the following components by weight percentage: glycine 10%, propionic acid 7%, and adipic acid 83%.
[0068] Coating performance index
[0069] Ni 85.88wt%
[0070] Sn 0.98wt%
[0071] P 13.14wt%
[0072] Porosity (15μm) None
[0073] Micro hardness 1200HV
[0074] Corrosion potential 390mV vs. SCE,
[0075] A...
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