Zinc-nickel alloy electroplating process for metal surface

An electro-galvanized nickel and alloy process technology, applied in the field of electroplating nickel alloys, can solve the problems of large workpiece mass loss and poor cyclic corrosion resistance of the workpiece, and achieve the effects of less mass loss, improved cyclic corrosion resistance and improved performance.

Pending Publication Date: 2022-02-22
成都高鑫机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The workpieces made by the above-mentioned electroplating zinc-nickel alloy process, after repeated cyclic corrosion tests, the quality loss of the workpieces is relatively large, and the cyclic corrosion resistance of the workpieces is not good.

Method used

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  • Zinc-nickel alloy electroplating process for metal surface
  • Zinc-nickel alloy electroplating process for metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Electroplating zinc-nickel alloy process for metal surfaces, including the following steps:

[0041] Pretreatment step: soak the workpiece in the surface treatment solution, soak for 4 minutes under the condition of 40rmp, and then wash the pretreated workpiece with water flow at 60°C to prepare the pretreated workpiece. Each liter of surface treatment solution contains hydrogen Sodium oxide 75g, alkyl glucoside 5g and oleic acid triethanolamine salt 15g;

[0042] Activation step: place the pretreated workpiece in the activation solution of citric acid and octyl dimethyl amine oxide, the mass ratio of citric acid and octyl dimethyl amine oxide is 2:0.6, let it stand for 30s, and remove it to obtain the active chemical parts;

[0043] Electroplating step: place the activated workpiece in the electroplating solution at 32°C for electroplating, the electroplating solution includes sodium hydroxide 120g / L, zinc ion content 6g / L, nickel ion content 1.2g / L, electroplating ti...

Embodiment 2

[0047] Electroplating zinc-nickel alloy process for metal surfaces, including the following steps:

[0048] Pretreatment step: Soak the workpiece in the surface treatment solution for 12 minutes at 30rmp, and then wash the pretreated workpiece with water at 70°C to obtain a pretreated workpiece. Each liter of surface treatment solution contains hydrogen Sodium oxide 75g, alkyl glucoside 5g and oleic acid triethanolamine salt 15g;

[0049] Activation step: place the pretreated workpiece in the activation solution of citric acid and octyl dimethyl amine oxide, the mass ratio of citric acid and octyl dimethyl amine oxide is 5:0.6, let it stand for 90s, and remove it to obtain the active chemical parts;

[0050] Electroplating step: Place the activated workpiece in an electroplating solution at 22°C for electroplating. The electroplating solution includes sodium hydroxide 140g / L, zinc ion content 10g / L, nickel ion content 2.4g / L, electroplating time is 45min, remove The workpiec...

Embodiment 3

[0054] Electroplating zinc-nickel alloy process for metal surfaces, including the following steps:

[0055] Pretreatment step: immerse the workpiece in the surface treatment solution, soak for 10 minutes under the condition of 40rmp, and then wash the pretreated workpiece with water at 65°C to prepare the pretreated workpiece. Each liter of surface treatment solution contains hydrogen Sodium oxide 60g, alkyl glucoside 2g and oleic acid triethanolamine salt 8g;

[0056] Activation step: place the pretreated workpiece in the activation solution of citric acid and octyl dimethyl amine oxide, the mass ratio of citric acid and octyl dimethyl amine oxide is 5:0.6, let it stand for 70s, and remove it to obtain the active chemical parts;

[0057] Electroplating step: Place the activated workpiece in an electroplating solution at 22°C for electroplating. The electroplating solution includes sodium hydroxide 140g / L, zinc ion content 10g / L, nickel ion content 2.4g / L, electroplating time...

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Abstract

The invention relates to the field of zinc-nickel alloy electroplating, and particularly discloses a zinc-nickel alloy electroplating process for a metal surface, which comprises the following steps: a pretreatment step: soaking a workpiece in a surface treatment liquid under a stirring condition, and then washing the pretreated workpiece with water; an activating step: placing the pretreated workpiece in an activating solution, standing, and fishing out to obtain an activated workpiece; an electroplating step: electroplating the activated workpiece in an electroplating solution, fishing out the workpiece, and repeatedly washing the electroplated workpiece to obtain an electroplated workpiece; a stabilizing step: placing the electroplated workpiece in a stabilizing agent, circularly and alternately reacting for three to five times in a vacuum heating and positive pressure heating mode, fishing out and carrying out ultrasonic water washing; and a finished product step, specifically, the workpiece cleaned in the stabilizing step is placed in a passivating agent to be passivated and washed with water, the workpiece is placed in a sealing agent after being cleaned, water washing is conducted again after standing is conducted, constant-temperature drying is conducted after cleaning is conducted, and the zinc-nickel alloy workpiece is obtained. And the prepared workpiece is good in circulating corrosion resistance and high in product quality.

Description

technical field [0001] The present application relates to the field of electroplating nickel alloys, more specifically, it relates to a process for electroplating zinc-nickel alloys on metal surfaces. Background technique [0002] With the development of industrial technology, the anti-corrosion requirements for metal workpieces are getting higher and higher, especially in harsh environments, conventional anti-corrosion methods, such as bluing, galvanizing, galvanizing, etc., can no longer meet the long-term anti-corrosion requirements of workpieces. The electroplating zinc-nickel alloy technology has excellent corrosion resistance and low hydrogen embrittlement, and the process flow is equivalent to that of electro-galvanizing, so it is loved by various manufacturers. [0003] For example, the patent application with the publication number CN111058067A discloses a zinc-nickel alloy electroplating process for metal surfaces, which involves the field of electroplating technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/34C25D3/56C25D5/48C23G1/14
CPCC25D5/34C25D3/565C25D5/48C23G1/14
Inventor 张震宇安涛金元
Owner 成都高鑫机械制造有限公司
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