Rare earth-nickel-cobalt-boron multi-element alloy anticorrosion and wear-resistant plating, electroplating liquid and preparation method of electroplating liquid

A multi-alloy, anti-corrosion and wear-resistant technology, applied in the field of metal surface treatment, can solve the problems of high internal stress, easy cracking, high energy consumption, etc., to achieve high current efficiency, reduce internal stress, and increase corrosion resistance.

Inactive Publication Date: 2012-05-02
黄激扬
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, with the increasing awareness of environmental protection in all countries in the world, the traditional hexavalent chromium electroplating process is facing a trend of being eliminated due to defects such as high pollution, high energy consumption, low efficiency, and difficult treatment, especially in the United States, the European Union and other countries. The use of hexavalent chromium plating
[0003] In order to replace heavily polluting hexavalent chromium plating, realize clean production, protect the ecological environment and people's health, as a binary or ternary alloy plating solution that replaces chromium plating, it has excellent corrosion resistance and wear resistance, and has hexavalent Chromium electroplating has excellent properties such as bright white appearance, high hardness and good wear resistance, but due to the high internal stress and high brittleness of the coating, cracks are easy to occur when the coating is thick

Method used

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  • Rare earth-nickel-cobalt-boron multi-element alloy anticorrosion and wear-resistant plating, electroplating liquid and preparation method of electroplating liquid
  • Rare earth-nickel-cobalt-boron multi-element alloy anticorrosion and wear-resistant plating, electroplating liquid and preparation method of electroplating liquid
  • Rare earth-nickel-cobalt-boron multi-element alloy anticorrosion and wear-resistant plating, electroplating liquid and preparation method of electroplating liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Heat 650ml of deionized water to 50°C-60°C, add 250g of nickel sulfate, 20g of cobalt sulfate, 50g of boric acid and 30g of nickel chloride, stir well until completely dissolved; adjust the resulting solution to PH=4 with 10% sulfuric acid , add 30 g of sodium citrate and 3 g of sodium tartrate, and stir well to obtain mixed solution I; take 0.1 g of lanthanum trioxide, first use deionized water to make a paste of rare earth, and then fully stir with 20% hydrochloric acid until the solution is clear , add to the mixed solution I, stir well to prepare the mixed solution II; take 2g of dimethylamine borane, adjust the pH to 10 with 50% ammonia water, add it to the mixed solution II, add deionized water to 1L, and stir well , to prepare a lanthanum-nickel-cobalt-boron multi-alloy anti-corrosion and wear-resistant electroplating solution.

[0031] Plating method:

[0032] 1. Carbon steel workpiece 50×50×1.2mm plated parts pretreatment: manual rust removal—water washing—oil...

Embodiment 2

[0044] Heat 650ml of deionized water to 50-60°C, add 200g of nickel sulfate, 30g of cobalt sulfate, 40g of boric acid and 40g of nickel chloride, stir well until completely dissolved; adjust the resulting solution to PH=5 with 50% ammonia water, Add 20g of citric acid and 4g of sodium tartrate, and stir well to obtain mixed solution I; take 0.5g of lanthanum trioxide, first use deionized water to make the rare earth into a paste, then fully stir with 20% hydrochloric acid until the solution is clear, add In the mixed solution I, stir well to prepare the mixed solution II; take 3g of dimethylamine borane, adjust the pH to 10 with 50% ammonia water, add it to the mixed solution II, fill up with deionized water to 1L, and stir well, A lanthanum-nickel-cobalt-boron multi-element alloy anti-corrosion and wear-resistant electroplating solution is prepared.

[0045] Plating is carried out in the same way as in Example 1. After testing, the coating contains 25wt% cobalt, 0.6wt% boron,...

Embodiment 3

[0047] Heat 650ml of deionized water to 50-60°C, add 220g of nickel sulfate, 40g of cobalt sulfate, 40g of boric acid and 50g of nickel chloride, stir well until completely dissolved; adjust the resulting solution to PH=5 with 50% ammonia water, Add 20g of citric acid and 4g of sodium tartrate, and stir well to obtain mixed solution I; take 1g of samarium trioxide, use deionized water to make a paste of rare earth, then fully stir with 20% sulfuric acid until the solution is clear, and add mixed solution In Ⅰ, stir thoroughly to prepare mixed solution II; take 4g of dimethylamine borane, adjust the pH to 10 with 50% ammonia water, add it to mixed solution II, fill up with deionized water to 1L, and stir well to obtain Samarium-nickel-cobalt-boron multi-alloy anti-corrosion and wear-resistant electroplating solution.

[0048]Plating is carried out in the same way as in Example 1. After testing, the coating contains 30wt% cobalt, 0.9wt% boron, and the remainder is nickel and a s...

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Abstract

The invention provides a rare earth-nickel-cobalt-boron multi-element alloy anticorrosion and wear-resistant plating, an electroplating liquid and a preparation method of the electroplating liquid. The plating is of an amorphous mingled nanocrystalline structure, and the microhardness of the plating is HV700-HV1300; and the plating comprises the following components by weight percent: 1wt%-40wt% of cobalt, 0.1wt%-1.5wt% of boron and the balance of nickel and trace rare earth. The electroplating liquid comprises the following components: 180-250g/L of nickel sulfate, 20-50g/L of cobalt sulfate, 30-60g/L of nickel chloride, 2-4g/L of dimethylamine-borane, 30-50g/L of boric acid, 0.001-2g/L of rare earth, 3-5g/L of sodium tartrate, 10-30g/L of sodium citrate or citric acid, and deionzied water which is added to achieve a metered/constant volume. The preparation method of the electroplating liquid comprises the following steps: dissolving nickel sulfate, cobalt sulfate, boric acid and nickel chloride with the deionized water and regulating the pH value; and adding sodium citrate or citric acid, sodium tartrate, rare earth and dimethylamine-borane for the constant volume and sufficiently stirring. The preparation method of electroplating liquid is simple to operate, is high in current efficiency and energy-saving and environmentally-friendly; and the plating is of the amorphous mingled nanocrystalline structure, and has bright, smooth and flaw-free appearance, extremely low porosity, high hardness and good anticorrosion and wear-resistant properties and comprehensive mechanical properties.

Description

Technical field [0001] The present invention is the field of metal surface treatment, which specializes in a rare earth -nickel -nickel -cobalt -boron multi -alloy anti -corrosion and abrasion -resistant plating layer, electroplating fluid and its preparation methods. Background technique [0002] At present, with the continuous enhancement of environmental protection awareness of countries around the world, the traditional hexavalent chromium plating process has faced the trend of being eliminated due to defects such as high pollution, high energy consumption, inefficient, and difficult treatment.The use of hexavalent chromium plating. [0003] In order to replace heavy pollution hexavalent chromium plating, realize clean production, protect the ecological environment and people's physical health, as a binary or three -yuan alloy plating of chromium plating, it has excellent corrosion resistance and abrasion resistance.The excellent appearance of the peculiar appearance of chrom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
Inventor 黄激扬刘伟
Owner 黄激扬
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