Acidic electroplating zinc-nickel alloy electrolyte, preparation method and electroplating method

Abstract

The invention discloses an acidic electroplating zinc-nickel alloy electrolyte, a preparation method and an electroplating method thereof; the electrolyte comprises a basic electrolyte and additives; the basic electrolyte is a weakly acidic solution which comprises zinc ions with mass concentration of 27-38g/L, nickel ions with mass centralization of 23-31g/L, chloride ions with mass concentration of 150-220g/L and boric acid with mass concentration of 25-35g/L at Ph value of 4.8-5.4 and at temperature of 28-35 DEG C; and the additives comprise a brightening agent of 1-12 ml/L, a walk agent of 3-30 ml/L and a disodium ethylenediamine tetraacetate complexant of 10-50 ml/L. The acidic electroplating zinc-nickel alloy electrolyte is rational in proportion and proper in matching; the galvanizing efficient is improved by 30-40% compared with the traditional acidic galvanizing; the corrosion resistance of a zinc-nickel coating can be improved remarkably and the service life of the coating is prolonged; the coating is high in hardness, corrosion resistance, abrasive resistance, pyro-oxidation resistance, compactness and comprehensive performance; the electrolyte does not need to the post-treatment technique, so that the adopted electroplating method is saved in cost, efficient and rapid, convenient in operation and far superior to the traditional alkaline zinc-nickel electroplating.

Description

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AI Technical Summary

Benefits of technology

This patented technical effect described in this patents relates to improving the quality (efficacy), durability, reliance upon an acidic plated metal layer or film technique called Zn—Ni alloy electricity gel elecrolithography. By controlling certain parameters such as pH value, type of salt added during immersion, and amount of other ingredients, these techniques enhance the efficiencies and reduce costs associated therewith compared to conventional methods like neutral elec trophoresis. Additionally, they provide improved protection against environmental factors including water vapor, oxygen, hydrogen sulfides, nitric acids, carbon dioxies, silica particles, iron powders, calcium salts, magnesia, manganese cations, phosphorus pentoxysulfonamide compounds, and various solvents containing them. Overall, these improvements lead to better results over existing technologies while reducing manufacturing complexity and increasing operational convenience.

Problems solved by technology

This patented describes how different methods for depositing metals onto surfaces have been developed over recent years due to their superior properties compared to other materials like chrome or brass. However, there may still exist issues related to these coatings, particularly if they were applied before casting (cast), especially after being subjected to high temperature environments where oxygen attacks). These challenges include poor adhesion caused by low levels of iron component(s) near the interface between the base material and the copper layers, reduced protectiveness against corrosives from environmental factors, increased resistance towards rust under certain conditions, and difficulty in obtaining good bond strength without causing damage through hydraulic pressure.

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