Metal surface multilayer nickel plating process with excellent corrosion resistance

A metal surface, multi-layer nickel plating technology, applied in the field of metal surface electroplating treatment, can solve problems such as difficult to meet product quality requirements, limited anti-corrosion ability, poor dispersion ability of plating solution, etc., to improve the coating coverage effect, slow down Corrosive, easily controlled effects

Inactive Publication Date: 2011-03-23
JIANGSU ZHENYU AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing electroplating technology, there are also some products that adopt multi-layer electroplating process, but the effect of electroplating in the low area is not good, especially the ability of anti-corrosion is limited
It is difficult to meet the ever-increasing product quality requirements in the automotive and motorcycle industry
[0003] Find according to retrieval, application number is a kind of multi-layer nickel plating process with excellent anticorrosion performance of 200610035169.6, the consumption of nickel sulfate in each coating layer is 240-320g / L, and the production cost is high, and in the waste liquid that bath discharges to take out The nickel content is large, the dispersion ability of the plating solution is poor, and the recovery is inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A kind of metal surface multi-layer nickel plating process with excellent anti-corrosion performance, its manufacturing process includes the following steps: from the inside to the outside, the first is semi-bright layer plating, the second is high-sulfur layer plating, and the third is bright layer plating The fourth is nickel sealing layer plating, and the fifth is decorative layer plating. The composition and proportion of each plating solution are:

[0011] A) Semi-bright layer---nickel sulfate 150g / L, nickel chloride 35g / L, boric acid 50g / L, semi-bright nickel primary brightener 3.0ml / L, semi-bright nickel secondary brightener 1.0ml / L, electric potential The difference adjusting agent is 0.8ml / L, the wetting agent is 2ml / L, and the rest is solvent water.

[0012] Description of the components of the plating solution:

[0013] 1. Nickel sulfate: Nickel sulfate and nickel chloride are Ni in the plating solution 2+ Its content is maintained by the rapid dissolution ...

Embodiment 2

[0052] A kind of metal surface multilayer nickel-plating process with excellent anticorrosion performance with embodiment one, its difference is: each coating bath composition and ratio are:

[0053] A) Semi-bright layer---nickel sulfate 165g / L, nickel chloride 40g / L, boric acid 35g / L, semi-bright nickel primary brightener 5.0ml / L, semi-bright nickel secondary brightener 0.3ml / L, electric potential The difference adjustment agent is 1.0ml / L, the wetting agent is 3.0ml / L, and the rest is solvent water.

[0054] B) High-sulfur layer --- nickel sulfate 150g / L, nickel chloride 45g / L, boric acid 40g / L, high-sulfur nickel brightener 15ml / L, wetting agent 3ml / L, and the rest is solvent water.

[0055] C) Bright layer---nickel sulfate 150g / L, nickel chloride 50g / L, boric acid 35g / L, bright nickel softener (also called moving agent) 12ml / L, bright nickel main light agent 0.5ml / L, The wetting agent is 2.0ml / L, and the rest is solvent water.

[0056] D) Nickel sealing layer---nickel su...

Embodiment 3

[0059] A kind of metal surface multilayer nickel-plating process with excellent anticorrosion performance with embodiment one, its difference is: each coating bath composition and ratio are:

[0060] A) Semi-bright layer---nickel sulfate 180g / L, nickel chloride 45g / L, boric acid 42g / L, semi-bright nickel primary brightener 7.0ml / L, semi-bright nickel secondary brightener 0.65ml / L, electric potential The difference adjusting agent is 1.2ml / L, the wetting agent is 2.5ml / L, and the rest is solvent water.

[0061] B) High-sulfur layer --- nickel sulfate 165g / L, nickel chloride 40g / L, boric acid 37g / L, high-sulfur nickel brightener 20ml / L, wetting agent 2ml / L, and the rest is solvent water.

[0062] C) Bright layer---nickel sulfate 180g / L, nickel chloride 45g / L, boric acid 42g / L, bright nickel softener (also called moving agent) 8ml / L, bright nickel main light agent 0.7ml / L, The wetting agent is 3ml / L, and the rest is solvent water.

[0063] D) Nickel sealing layer---nickel sulfa...

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PUM

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Abstract

The invention relates to a metal surface multilayer nickel plating process with excellent corrosion resistance. The manufacture process comprises the following steps of: plating a semi-bright layer firstly, plating a high-sulfur layer secondly, plating a bright layer thirdly and plating a nickel sealing layer fourthly from inside to outside. By adopting the technical scheme, the invention has the advantages of improving plating covering effect of a low current area, increasing the potential difference among nickel layers, protecting a matrix, slowing down the corrosion and greatly strengthening the corrosion resistance of the matrix by adopting the low concentration multilayer nickel (semi-bright nickel, high-sulfur nickel, bright nickel and nickel sealing) plus chrome plating process in an electroplating process, and by adopting the semi-bright nickel plating at the bottom layer, excellent leveling capability and scalability can be obtained, a plating solution is easy to control, harmful products cannot be produced after long-time operation, and the plating contains no sulfur and has higher corrosion resistance.

Description

technical field [0001] The invention relates to a metal surface electroplating treatment technology, in particular to a metal surface multilayer nickel plating process with excellent anticorrosion performance. Background technique [0002] With the development of technology and the progress of society, the requirements for the appearance of products are constantly improving. As a traditional surface treatment process, electroplating process has been widely used in many fields. The currently used electroplating process mainly has two functions; one is decorative electroplating with the main purpose of appearance decoration; the other is functional electroplating with anti-corrosion as the main purpose. In some industries, the plated parts are also required to have the above two functions at the same time, especially the automobile and motorcycle industries. Due to the use characteristics of the products, the above-mentioned products should be exposed to the outdoors for a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/14C25D3/12
Inventor 朱富顺
Owner JIANGSU ZHENYU AUTOMOBILE PARTS
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