Large-thickness high-phosphorus amorphous Ni-Mo-P chemical plating solution, plating layer preparation method and application
An electroless plating, ni-mo-p technology, applied in the direction of liquid chemical plating, coating, metal material coating technology, etc., can solve the problem of less amorphous coating, restricting the application of coating, and the degree of amorphization of the coating is not high, etc. problems, to achieve the effect of high corrosion resistance, stable performance and good thermal stability
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no. 1 example
[0038] A preparation method of large-thickness high-phosphorus amorphous Ni-Mo-P electroless plating coating, comprising the steps of:
[0039] (1) Use Q235 as the base material to cut into samples, and then use 200 mesh, 400 mesh, 600 mesh, 800 mesh, and 1000 mesh silicon carbide sandpaper to polish the sample to make the surface smooth and bright. After completion, use deionized Just rinse with water.
[0040] (2) Carry out degreasing treatment to the sample after polishing with alkaline lotion: the concrete composition of alkali lotion is: NaOH 30g / L, NaOH 30g / L, NaOH 2 CO 3 25g / L, Na 4 PO 4 12H 2 O 10g / L, Na 2 SiO 3 9H 2 O 10g / L, OP-10 2g / L. The alkali washing temperature is 85°C; the alkali washing time is 30 minutes, and air explosion stirring is used during the alkali washing process. After completion, rinse with deionized water 3 times to remove residual lye.
[0041] (3) Derust and rinse the degreased sample with pickling solution: the pickling solution is ...
no. 2 example
[0045] A preparation method of large-thickness high-phosphorus amorphous Ni-Mo-P electroless plating coating, comprising the steps of:
[0046] (1) Use Q235 as the base material to cut into samples, and then use 200 mesh, 400 mesh, 600 mesh, 800 mesh, and 1000 mesh silicon carbide sandpaper to polish the sample to make the surface smooth and bright. After completion, use deionized Just rinse with water.
[0047] (2) Carry out degreasing treatment to the polished sample with alkali lotion: the specific composition of alkali lotion is: NaOH 25g / L, NaOH 2 CO 3 20g / L, Na 4 PO 4 12H 2 O 7g / L, Na 2 SiO 3 9H 2 O 13g / L, OP-10 4g / L. The alkali washing temperature is 75°C; the alkali washing time is 40 minutes, and air explosion stirring is used during the alkali washing process. After completion, rinse with deionized water 4 times to remove residual lye.
[0048] (3) Derusting and rinsing the degreased sample with pickling solution: the pickling solution is HCl solution with...
no. 3 example
[0052] A preparation method of large-thickness high-phosphorus amorphous Ni-Mo-P electroless plating coating, comprising the steps of:
[0053] Steps (1)-(4) are the same as those in the first embodiment and will not be repeated here.
[0054] (5) The temperature of the plating system is controlled by a digital display constant temperature water bath. The plating temperature is 82±2° C., the pH value of the plating solution is controlled at 8.5, and the pH value of the plating solution is adjusted using ammonia water with a mass concentration of 5%. The plating time is 4.5h. The components of the electroless plating solution are: nickel sulfate 25g / L, sodium molybdate 0.4g / L, sodium citrate 30g / L, sodium acetate 13g / L, sodium hypophosphite 25g / L, thiourea 1.2mg / L. Because the plating time is long, it is necessary to add ammonia water with a mass concentration of 5% to the plating solution every half hour to adjust the pH value, so as to ensure that the plating solution can ac...
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