Full Bright Electroless Nickel

HN - 998 is a new electroless plating Ni - P Alloy. The process has excellent stability. Phosphorus coating 7 ± 2% (wt%), the highest deposit rates up to 27 m / hr. HN - provided 998 is pleasing tone bright coating, and has excellent corrosion resistance, can be widely used in computer accessories, hardware accessories decoration hanging plating, barrel plating. Physical properties of the coating of the phosphorus content (wt%) 5-9 plating density (g / cm3) 7.8-8.0 Melting point (℃): 880-960 Hardness (plated): 550-720HV heat treatment (400 ℃ 1 hour): 900 -1000HV characteristics Express deposition rate: 18-27 m / h, the average deposition rate of the first six cycles of up to 19 m / hour. More stable phosphorus content, the coating has excellent corrosion and ductility. Excellent stability, the longest useful life of more than 10 cycles. Bath easy to operate. . Wide load range bath 0.5-3.4dm2 / L equipment requirements of the plating tank: It is recommended to use PP plating bath or anodized stainless steel protection plating tank. Heater: coated with PTFE heaters, passivated stainless steel heater may be used. Heating the bath should avoid overheating. Filtration: continuous filtration can be 5-10 micron filter; batch filtration using a 3 micron filter. Mixing: The best use of mechanical movement was stirring, but also be used to clean oil-free low-pressure air agitation. However, excessive air agitation is harmful. Bath preparation HN - 998A: 60ml / L HN - 998 B: 100ml / L of distilled or deionized water: 840ml / L first with distilled or deionized water plating tank (stainless steel tanks subject to passive treatment) After the addition of about 50% by volume of distilled or deionized water, then add the required amount of HN - 998A and HN - 998B, stir, adjust the pH to 4.6 to 4.8. It may be used to increase the pH value of 25% or 50% potassium carbonate aqueous ammonia; pH can be lowered by 10% sulfuric acid. With distilled or deionized water to add to the volume of regulations, the bath was heated to 88 ℃, recheck pH, as has been in the 4.6-4.8 range, the bath can be used. Operating conditions nickel: 5.0-6.2g / L (optimum 5.8) pH: 4.7-4.9 Temperature: 85-92 ℃ (optimum 88 ℃) bath load: 0.5-3.4dm 2 / L