Chemical plating solution formula for Ni-P-Ag nano-coating and plating process thereof
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A nano-plating and electroless plating technology, which is applied in the field of electroless plating solution formula and plating process of Ni-P-Ag nano-coating, can solve the problems of unsatisfactory requirements and single performance characteristics of Ni-P, and achieve surface Smooth, hard-coated effect
Pending Publication Date: 2018-07-24
SHANGHAI OCEAN UNIV
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Problems solved by technology
However, the performance characteristics of Ni-P are relatively single, which cannot meet the needs of some special occasions.
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Embodiment 1
[0039] With brass sheet as the base material, the formula and component content of the specific plating solution are as follows:
[0040] A plating solution:
[0041] Nickel sulfate hexahydrate 23 g / L,
[0042] Sodium hypophosphite monohydrate 28 g / L,
[0043] Trisodium Citrate Dihydrate 100 g / L,
[0044] Ammonium sulfate appropriate amount,
[0045] pH 10,
[0046] B plating solution:
[0047] Silver nitrate 1 g / L,
[0048] appropriate amount of complexing agent,
[0049] pH 10.
example 1
[0050] Taking example 1 as example below, set forth the concrete implementation method of the present invention:
[0051] (1) Use 400#, 800#, and 1600# metallographic sandpaper in sequence to polish the surface of the brass sheet to ensure the smoothness of the brass surface.
[0052] (2) Alkaline degreasing is to use the saponification of alkaline solution to remove the grease on the surface of the substrate. The alkaline solution consists of 20g / LNaOH, 20g / L NaOH 2 CO 3 , 35g / L Na 3 PO 4 And 4g / L of OP-10 formulated. The alkaline solution was heated to 85°C, and the brass pieces were immersed for 15 minutes, after which they were rinsed with deionized water. The purpose of pickling and rust removal is to remove the rust on the surface of the brass to improve the bonding strength between the brass and the electroless plating. The method is to immerse the brass in 10% H 2 SO 4 in solution for 10 seconds.
[0053] (3) surface activation, the matrix has a volume fraction...
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Abstract
The invention discloses a chemical plating solution formula for a Ni-P-Ag nano-coating and a plating process thereof. The formula comprises a plating solution A and a plating solution B, wherein the plating solution A and the plating solution B are used after being mixed. The plating solution A is prepared from the following components: 20 to 25g/L of nickel sulfate hexahydrate, 25 to 30g/L of sodium phosphite monohydrate, 50 to 100g/L of trisodium citrate dihydrate and 30 to 50g/L of pH buffering agent; the plating solution B is prepared from the following components: 1 to 2g/L of silver nitrate and 50 to 80mL/L of complexing agent. The plating process comprises the following steps: performing alkaline degreasing, acid pickling, and rust removing, and surface activation pretreatment; preparing and mixing the plating solution A and the plating solution B respectively; plating the mixed plating solution. The Ni-P-Ag nano-coating prepared by the formula and the process has a bright, clean, flat and firm surface, is 200 to 300 nanometers in nanoparticle diameter, has higher corrosion resistance and higher microorganism resistance, and has high application value in various energy, chemical and power equipment and devices needing antibacterial and anti-biofouling coatings.
Description
technical field [0001] The invention relates to the technical field of electroless plating of nano-silver alloy coatings, in particular to an electroless plating solution formula of Ni-P-Ag nano-coatings and a plating process thereof. Background technique [0002] Since the method of electroless plating was proposed in the second half of the last century, it has been continuously developed for decades. Among them, Ni-P coating has been widely used in chemical industry, vehicles and in the textile industry. However, the performance and characteristics of Ni-P are relatively single, which cannot meet the needs of some special occasions. The purpose of the present invention is to obtain an antibacterial and anti-biological fouling coating, and the application fields are fluid machinery, heat exchange equipment and devices in the energy, chemical and electric power industries. The present invention selects Ag with spectrum antibacterial effect as the anti-biofouling component,...
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