Ammonia-free environment-friendly medium-phosphorus chemical nickel plating solution and preparation method thereof

Abstract

The invention relates to the technical field of chemical plating, in particular to an ammonia-free environment-friendly medium-phosphorus chemical nickel plating solution and a preparation method thereof. The ammonia-free environment-friendly medium-phosphorus chemical nickel plating solution comprises, by weight, 35-50 parts of heat-stable lactic acid, 700-730 parts of nickel sulfate, 70-88 partsof organic acid, 30-45 parts of sodium acetate, 120-155 parts of sodium hypophosphite, 0.02-0.05 part of wetting agent and 0.08-0.11 part of intermediate. The ammonia-free environment-friendly medium-phosphorus chemical nickel plating solution is compounded through the specific organic acid, and therefore the electroplating solution can have good high-temperature resistance after being actually electroplated on the surface of a material, the protection effect on the surface of the material in the high-temperature environment is further achieved, and the use performance of the material in thehigh-temperature environment is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electroless plating, and more specifically relates to an ammonia-free and environmentally friendly phosphorous electroless nickel plating solution and a preparation method thereof. Background technique [0002] Electroless plating is a method of forming a metal coating on the object to be plated through the oxidation-reduction reaction of the metal. It can be plated regardless of the shape of the product, and it can also be plated on insulating objects after a specific pretreatment process. Therefore, it is used in various industrial fields. [0003] The importance of surfaces plated by electroless plating is increasing in the component material industry such as mounting surfaces or bonding interfaces for ultra-small components with high density in various packaging fields. Recently, with the reduction in weight, miniaturization and high functionality of electronic products, higher density and smaller oc...

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Problems solved by technology

[0004] However, during the use of some electroplating solutions, the surface of the coating formed by it is often relatively dull, and it is not easy to have a relatively bright metallic luster, so that the appearance of the metal coated with the above coating is not bright enough. In many cases where the appearance is required It may lead to unqualified products, which will greatly increase the production cost of products.