Electroless Nickel Plating Process Electroless Nickel Plating Principle Stainless Steel Electroless Nickel Plating

Black nickel special nickel plating liquid

First, the product code: Q / YS.602-3 (Yi Shun brand)

Second, product features:

The chemical nickel-plated liquid is suitable for iron, steel, zinc alloy, zinc-treated aluminum alloy and copper alloy plated matt nickel alloy layer. This product is non-toxic, environmentally friendly. No plating equipment. Just thermostat device, the coating is matte nickel-phosphorus alloy layer, excellent corrosion resistance, excellent binding. Strong bath stability, life expectancy more than 12 cycles. This product is not only suitable for nickel plated metal surface (such as: iron, stainless steel, aluminum, copper, etc.), the same applies to non-metallic nickel plating, and does not require expensive palladium, low cost. For example: ceramic coated with low phosphorus nickel, glass coated with low phosphorus nickel, diamond plated low phosphorus nickel, carbon coated with low phosphorus nickel, plastic coated with low phosphorus nickel, resin plated low phosphorus nickel, and so on. Bath maintenance is simple. Low cost, no plating equipment. This coating can be used for chemical nickel plating before blackening.

Third, the product composition:

Products A, B, C three agents, A and B ratio of 1: 2 open cylinder, with A and C ratio of 1: 1 added as an intermediate supplement.

Fourth, open cylinder preparation and use of agents:

① A and B agent with water with the match, with the ratio of A: B: water = 1: 2: 7.

② with pure water to clean the plating tank. Then add half the size of the tank to the tank pure water.

③ first B agent proportionally added to the tank stir, while stirring slowly add A agent.

④ add deionized water to the specified volume.

⑤ heating bath bath temperature stability at 90 ℃ ± 3 ℃.

Fifth, the operation process:

① pre-treatment: Pre-treatment of the coating quality is essential, to make the surface of the workpiece before plating no pollution, and is in an activated state, this process are: degreasing, rust, polishing, washing.

② pickling activation: pickling activator soak the workpiece with 2-3 minutes, and then washed.

③ rinse the workpiece with hot deionized water, the workpiece temperature, in order to avoid the next plating, the cold workpiece cooling bath to absorb heat and lead to stop plating.

④ in accordance with the loading ratio 0.5-1.5d㎡/ liter suspended hanging in the bath, the bath temperature control at 90 ℃ ± 3 ℃, the use of time ≥ 5 minutes, depending on the thickness of the plating process, there must be Slight mechanical stirring.

⑤ plating process should be mild light mixing, the temperature and bath evenly distributed, so as to ensure the stability of chemical nickel plating, and coating consistency. At the same time, the bath should be cyclically filtered. Filter: aperture 1-8 microns, resistant to 100 degrees Celsius, acid.

⑥ nickel plated with hot water to be completed, if necessary, can be passivated.

⑦ for the black before the nickel plating time to 1-1.5 hours.

Sixth, the maintenance of chemical nickel plating:

① in the plating process, because of the constant consumption of ingredients, plating speed will slow down, according to the number of bubbles to add supplements A and C, according to A: C = 1: 1 added. To supplement a small amount of times. Each consumption of one gram of nickel metal, need to add A and C each 10 ml. When a large number of replenishments A and C, the first cold plating, then add A, C supplements, and stir, in order to carry out nickel plating.

 ② plating process, the bath pH value will change, fresh bath PH control 7.5 ~ 8.5, with the bath aging, PH value will slowly rise.

 ③ for copper and its alloy surface nickel to use clean wire or aluminum wire and copper workpiece contact plating.

   ④ plating process to the bath often analysis test: PH value and nickel ion content.

Nickel detection method: Take 5.00ml plating solution into a 500ml flask, add 100ml of deionized water, then add 100ml of ammonia, add carbamate indicator. With 0.05mol / L of EDTA titration from orange to purple as the end point, the volume of milliliters consumed EDTA is recorded as V.

Formula: Nickel (g / L) = 0.587 * V

⑤ chemical plating of low-phosphorus nickel before going through rigorous pre-treatment, to ensure that the surface of the workpiece in a clean state of activation.

⑥ often inspect the equipment: automatic temperature control system, circulating filtration system, timely detection and timely exclusion.

⑦ bath loading ratio to be controlled at 0.5d㎡ -1.5d㎡.

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