Electroplating technology of shining tin zinc nickel alloy

Abstract

The invention relates to a preparation method of a decorative metal surface protection, and belongs to the field of material preparation and processing. The main technical characteristics are as below: step 1: oil removal by alkali washing to remove grease on part surface and protect the surface color from turning into black; step 2, activation by using an activation solution composed of a carbon steel activation solution and a copper part activation solution; and step 3, plating by using a plating solution containing 170 g / L of potassium pyrophosphate, 11 g / L of stannous sulfate, 25 g / L of zinc sulfate, 25 g / L of nickel sulfate, 60 g / L of sodium sulfate, 0.6 g / L of a water-soluble additive, 0.3 g / L of rosin and 1.5 g / L of sodium dodecyl sulfate, and under the conditions of current density of 0.05 A / dm<2>, temperature of 25-45 DEG C, pH value of 8.5, plating time of 10 min, an anode of a tin zinc nickel three-electrode, the ratio of tin, zinc and Ni of 1:1:1, and a cathode of carbon steel. The invention has the advantages that the current density is low and that the coating can reach 10 mum in a short period of time (5-10 min) and has uniform and compact surface and silver mirror brightness.

Description

technical field

[0001] The invention relates to a method for preparing a metal porous material with controllable through holes, belonging to the field of material preparation and processing. Background technique

[0002] Tin alloy coating is a coating with certain corrosion resistance and good solderability. It has high chemical stability and strong oxidation resistance. It is widely used in electronics, national defense, machinery, food industry and other fields. Such as anti-corrosion of tinplate cans and copper containers, soldering of electronic components, protection of gunpowder and rubber contact parts, mechanical anti-friction, sealing, precision thread anti-loosening and anti-seepage treatment of nitrided parts, etc. [8] .

[0003] Electroplated tin-zinc-nickel alloy is developed from electroplated tin alloy. It has a bright and white appearance like silver and has a good aesthetic and decorative effect. Due to the addition of Ni in the alloy, its corrosion resista...

Examples

Embodiment

[0051] Example: Put the carbon steel sample as the cathode, first put it in 5% NaOH, heat it to 70°C, let it stand for 3~5 minutes, put it in 5% hydrochloric acid after washing with water, and activate it for 5 minutes to completely remove the surface rust, wash it with water, and then Electroplating, electroplating anodes use nickel plate and tin-zinc plate, both of the same size, placed on both sides of the plating tank, connected to the electroplating power supply with copper wire, the power supply adopts a DC stabilized power supply. Plating solution: Potassium pyrophosphate (K 4 P 2 o 7 ) 170g / L, stannous sulfate (SnSO 4 ) 11g / L, zinc sulfate (ZnSO 4 ·7H 2 O) 25g / L, nickel sulfate (NiSO 4 ·6H 2 O) 25g / L, sodium sulfate (NaSO 4 ) 60g / L, water-soluble additive 0.6g / L, rosin (C 19 h 29 COOH) 0.3g / L, sodium dodecyl sulfate (C 12 h 25 SO 3 Na) 1.5g / L, current density 0.05A / dm 2 , the temperature is 25℃~45℃, the pH is 8.5, and the current density is 0.05A / dm 2...

technical field

[0001] The invention relates to a method for preparing a metal porous material with controllable through holes, belonging to the field of material preparation and processing. Background technique

[0002] Tin alloy coating is a coating with certain corrosion resistance and good solderability. It has high chemical stability and strong oxidation resistance. It is widely used in electronics, national defense, machinery, food industry and other fields. Such as anti-corrosion of tinplate cans and copper containers, soldering of electronic components, protection of gunpowder and rubber contact parts, mechanical anti-friction, sealing, precision thread anti-loosening and anti-seepage treatment of nitrided parts, etc. [8] .

[0003] Electroplated tin-zinc-nickel alloy is developed from electroplated tin alloy. It has a bright and white appearance like silver and has a good aesthetic and decorative effect. Due to the addition of Ni in the alloy, its corrosion resista...

Examples

Embodiment

[0051] Example: Put the carbon steel sample as the cathode, first put it in 5% NaOH, heat it to 70°C, let it stand for 3~5 minutes, put it in 5% hydrochloric acid after washing with water, and activate it for 5 minutes to completely remove the surface rust, wash it with water, and then Electroplating, electroplating anodes use nickel plate and tin-zinc plate, both of the same size, placed on both sides of the plating tank, connected to the electroplating power supply with copper wire, the power supply adopts a DC stabilized power supply. Plating solution: Potassium pyrophosphate (K 4 P 2 o 7 ) 170g / L, stannous sulfate (SnSO 4 ) 11g / L, zinc sulfate (ZnSO 4 ·7H 2 O) 25g / L, nickel sulfate (NiSO 4 ·6H 2 O) 25g / L, sodium sulfate (NaSO 4 ) 60g / L, water-soluble additive 0.6g / L, rosin (C 19 h 29 COOH) 0.3g / L, sodium dodecyl sulfate (C 12 h 25 SO 3 Na) 1.5g / L, current density 0.05A / dm 2 , the temperature is 25℃~45℃, the pH is 8.5, and the current density is 0.05A / dm 2...

Images