Nickel-chromium plated parts and method of manufacture

Abstract

The invention discloses a nickel-chrome-plated part and a method for manufacturing the same, wherein the nickel-chrome-plated part comprises a base material; a pre-treatment coating deposited on the entire base material, and a copper-plated layer is formed on the pre-treatment coating; and a base layer , which is formed on the copper plating layer; and a functional layer, which is formed on the base layer, wherein the functional layer includes a low potential nickel layer and a microporous nickel layer formed on the low potential nickel layer; and a decorative layer, which is formed on the micro On the hole nickel layer, the decorative layer is any one of trivalent chromium plating or hexavalent chromium plating. The present invention increases the low-potential nickel coating on the basis of the micropores and chrome-plating process on the surface of the component, thereby improving the corrosion resistance of the product, especially the corrosion resistance of trivalent chromium-plated products, which can promote more environmentally friendly trivalent chromium Larger-scale promotion and application of products.

Description

technical field [0001] The invention relates to a workpiece with a surface coating structure and a manufacturing method thereof, in particular to a nickel-chromium plated part and a manufacturing method thereof. [0002] In this application, the potential difference is the difference between the standard potentials measured by taking each of the two adjacent layers as a whole. Background technique [0003] The European market has increasingly stringent environmental protection requirements, and the main engine manufacturers have higher and higher requirements for electroplating corrosion resistance. At present, trivalent chromium electroplating cannot meet the corrosion requirements of specific environments (at the same time, it can meet the salt spray test 80h and Russia Mud test 336h). [0004] In the electroplating industry, the method of firstly plating double-layer nickel or triple-layer nickel and then chromium plating is generally used to improve the anti-corrosion a...

AI Technical Summary

Problems solved by technology

The micro-crack nickel plating process on the surface of plastic parts is: A. Metallization of plastic parts, B. Bright copper, C. Semi-bright nickel, D. High sulfur nickel, E. Bright nickel, F. Microporous nickel, G. Washing , H. bright chromium, I. washing, J. drying; although adopting this four-layer nickel-nickel electroplating solution to carry out electroplating on the plastic surface has improved the corrosion resistance of plastic parts to a certain extent in this technical scheme, yet the anticorrosion property of this process Corrosiveness still cannot be achieved with de-icing salts (CaCl 2 ) corrosive environment requirements, the high-sulfur nickel electroplating layer has local fogging phenomenon, in addition, due to the insufficient surface treatment of the plastic in this method, the deep plating ability of the coating layer is poor, and the coating layer is easy to become brittle. Grille, trim, door handle) after short service life

And about the technique of introducing micro-crack nickel, as Chinese patent application (publication number: CN101705508A) relates to a kind of electroplating solution and application thereof for micro-crack nickel electroplating, the main composition of this micro-crack nickel electroplating solution is as follows: nickel chloride: 180-260 g / l, acetic acid: 20-60 ml / l, ELPELYT MR: 80-120 ml / l, 62A: 1-5 ml / l, the evaluation of examples described in the patent literature is actually limited to hexavalent chromium plating , without mentioning trivalent chromium plating

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