Pretreatment method for iron-based hardware electroplating

A hardware and iron-based technology, applied in the field of pre-treatment of iron-based hardware electroplating, can solve problems such as poor corrosion resistance, and achieve the effect of uniform and beautiful coating and high anti-corrosion performance.
CN103484909AInactive Publication Date: 2014-01-01昆山纯柏精密五金有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
昆山纯柏精密五金有限公司
Publication Date
2014-01-01
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a pretreatment method for iron-based hardware electroplating. The method is characterized by comprising the steps of: firstly using an alkaline solution and an acidic solution to clean iron-based hardware; then subjecting the hardware to electrochemical polishing treatment, with an employed chemical polishing solution containing 140-160mL / L hydrogen peroxide, 120-160mL / L acetic acid, 60-80mL / L concentrated nitric acid, 30-50g / L aminosulfonic acid, 10-20mL / L hydroxyethylidene diphosphonic acid and 6-10g / L sodium dodecyl sulfate; adopting a lead electrode as a cathode and the hardware as an anode to perform electrochemical treatment for 20-40min, and keeping the electric current density at 5-8A / dm<2>. The pretreatment method for iron-based hardware electroplating provided by the invention can make the hardware acquire a plating layer with excellent bonding properties in the follow-up electroplating process, and the plating layer is uniform and beautiful, and has high anti-corrosion performance.
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Description

technical field

[0001] The invention relates to the technical field of surface treatment of hardware, in particular to a pretreatment method for electroplating of iron-based hardware. Background technique

[0002] Hardware parts refer to various metal devices made of iron, steel, aluminum and other metals through forging, rolling, cutting, etc. physical processing, such as hardware tools, hardware parts, daily hardware, construction hardware and security supplies, etc. Hardware is widely used in the production and manufacturing of all walks of life. Iron-based materials are relatively cheap and easy to process, so iron-based materials are widely used in the manufacture of hardware, but the corrosion resistance of iron-based materials is relatively poor, and generally undergo surface treatment processes to prevent subsequent processing of hardware. Oxidation and corrosion occur during use.

[0003] Improving the corrosion resistance of iron-based materials mainly starts fro...

Claims

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