Nickel plating brightening agent and electroplating method

Abstract

The invention discloses a nickel plating brightening agent and an electroplating method, wherein the nickel plating brightening agent is prepared from 60 to 150g / L of sodium proparagylsulfonate, 10 to80g / L of sodium alkyl sulfonate, 0.6 to 1.5g / L of saccharin, 1 to 20g / L of polyether amine, 5 to 15g / L of organic polysulfide and 10 to 30g / L of boracic acid. Several substances in the nickel platingbrightening agent are not singly superimposed; through a certain synergistic effect, the characteristics of various substances are used for achieving the mutual promotion effect; the side effects arefew; the effect is good. In various nickel plating brightening agents, the formula of the brightening agent is simple; the obtaining is easy; the consumption of various substances is little. The nickel plating brightening agent has the advantages that the porosity of a plating layer is reduced; the luminance brightness of the plating layer is improved; the dispersion capability of plating liquidis enhanced; the ductility of the plating layer is improved, so that the plating layer obtains good low-current density region covering capability.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a nickel plating brightener and an electroplating method. Background technique [0002] Adding a brightener to the nickel plating solution can not only prevent or delay the spontaneous decomposition of the nickel plating solution, stabilize the plating solution, but also speed up the reaction and improve the phosphorus content and internal stress of the nickel plating layer. Therefore, for a For mature nickel plating products, brightener is an essential and important component. [0003] The development of nickel plating brighteners has gone through four stages: the first stage is the use of inorganic brighteners, such as cadmium salts, etc.; the second stage is butynediol and saccharin; the third stage is butynediol and epoxy compounds The condensate and saccharin; the fourth stage is the secondary brightener compounded by the intermediate and the softener as the primary ...

AI Technical Summary

Problems solved by technology

Directly use propynyl alcohol instead of butynediol, the bright and leveling property is much better, but the coating is very brittle, so it is not suitable to add directly

The fourth-generation primary brightener for nickel plating is a softener, which is actually compounded from several intermediates, and the products vary greatly.

The advantage is: when the double nickel is combined with semi-bright nickel, it is easy to meet the requirement of a potential difference above 120mV. The disadvantage is: the corrosion resistance of the coating itself is not very good

[0008] Second, the common white fog or dark spots in the low current density area

[0009] Third, the low area becomes dark, and the brightness of the high and middle areas decreases

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