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Lead-based multivariant alloy electroplating anode

A multi-component alloy and anode technology, applied in the direction of the electrode, can solve the problems of rapid temperature rise in the anode area, limited power supply selection, accumulation of iron impurities, etc., and achieve the effect of good coating quality

Inactive Publication Date: 2012-10-24
INNER MONGOLIA FIRST MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned problems of limited power supply selection, low anode strength, accumulation of iron impurities, and rapid temperature rise in the anode area by improving the selection of anode materials for electrochromium plating.

Method used

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Effect test

Embodiment 1

[0011] The formula used is: chromic anhydride 230~270g / L, sulfuric acid 2.3~2.7g / L; temperature 55℃~60℃, current density 50~60A / dm 2 . The anode is electroplated with a tin content of 8%, an antimony content of 5%, a bismuth content of 4%, and lead as the balance. Ordinary electroplating power supply can be selected, and the profiling anode is not deformed, the accumulation of iron impurities is less, the temperature of the anode area is similar to the temperature of the bath solution, the quality of the obtained coating is good, the current efficiency is increased by more than 5%, and the depth capability is increased by more than 30%.

Embodiment 2

[0013] The formula used is: chromic anhydride 280-320g / L, sulfuric acid 2.8-3.2g / L, trivalent chromium (Cr 3+ )2.8~6.4g / L; temperature 40℃~50℃, current density 10A / dm 2 ~20A / dm 2 . The anode is electroplated with a tin content of 10%, a bismuth content of 6%, and an anode with lead as the balance. Ordinary electroplating power supply can be selected, and the profiling anode is not deformed, the accumulation of iron impurities is less, the temperature of the anode area is similar to the temperature of the bath solution, and the quality of the obtained coating is good.

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Abstract

The invention relates to a lead-based multivariant alloy electroplating anode, and in particular relates to an anode material of lead-based multivariant alloy for electroplating chromium. The invention solves the problems that through the improvement of an electroplating chromium anode material, the selection of a power supply is limited, the strength of an anode is low, the iron impurities are accumulated, the temperature of an anode region is quickly increased, and the like. The lead-based multivariant alloy electroplating anode is prepared by the following step of forming an alloy material by any two or all of tin, stibium and bismuth so as to prepare the anode, wherein the anode comprises the following specific components in percentage by weight: 5-10% of tin, 2-6% of stibium, 3-9% of bismuth and the balance of lead. According to the lead-based multivariant alloy electroplating anode, the temperature of the anode region is close to the temperature of bath solution, and excellent plating quality can be obtained.

Description

Technical field: [0001] The invention relates to an electroplating anode, in particular to an anode material for electroplating chromium of a lead-based multi-element alloy. Background technique: [0002] At present, the anodes used in electrochrome plating are usually: 1) pure lead anodes, or lead alloys containing 6% to 8% antimony, must use a power supply with a small ripple factor, and the anodes need to be brushed regularly, otherwise the conductivity of the anodes is poor. 2) Lead alloy anodes containing 30% to 50% tin and 1% silver, or lead alloy anodes containing 10% tin, have low anode strength, and when complex parts are electroplated, the imitation anode is easily deformed. 3) Ordinary steel is prone to accumulation of iron impurities, narrow bright area, and poor deep plating ability. 4) Graphite anode, the temperature of the anode area rises rapidly, resulting in poor plating thickness, large internal stress of the coating, and low bonding force of the coating....

Claims

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Application Information

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IPC IPC(8): C25D17/10C22C11/10C22C11/06
Inventor 李文刚孙宣杰石宝文赵文军吕中慧张伟东李连喜刘庆东王金栋高培军王卓臧磊柴钰付超王雯宝民刘芳
Owner INNER MONGOLIA FIRST MACHINERY GRP
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