A high-frequency pulse low-temperature rapid rust removal device and method

A high-frequency pulse and fast technology, applied in the direction of electrolysis components, electrolysis process, etc., can solve the problems of low efficiency, long pickling time, difficult harmless treatment, etc. The effect of product technical content

Inactive Publication Date: 2016-04-20
HUBEI PROVINCIAL COMM INVESTMENT FOUR ADVANTAGE STEEL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the concentration of sulfuric acid used is relatively high, the harmless treatment is difficult, and the pickling time is long and the efficiency is low

Method used

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  • A high-frequency pulse low-temperature rapid rust removal device and method
  • A high-frequency pulse low-temperature rapid rust removal device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 36%wtHCl, 3% 98%wtH of mass fraction 9% are prepared in the derusting tank body 5 in the above-mentioned device 2 SO 4 , 5% Na 3 PO 4 , the balance is the derusting solution of water. Each electrode plate 1 is hung with 15 pieces of 50# angle steel made of Q235, the power supply 6 is turned on, the current value is 50A, the frequency is 8kHz, and the rust removal time is 5min.

Embodiment 2

[0047] Prepare 36%wtHCl, 5% 98%wtH of mass fraction 13% in the derusting tank body 5 in the above-mentioned device 2 SO 4 , 6% Na 3 PO 4 , the balance is the derusting solution of water. Each electrode plate 1 is hung with 15 pieces of 50# angle steel made of Q235, the power supply 6 is turned on, the current value is 50A, the frequency is 25kHz, and the rust removal time is 4.8min.

Embodiment 3

[0049] Prepare 36%wtHCl, 5% 98%wtH of mass fraction 13% in the derusting tank body 5 in the above-mentioned device 2 SO 4 , 6% Na 3 PO 4 , the balance is the derusting solution of water. Each electrode plate 1 is hung with 15 pieces of 50# angle steel made of Q235, the power supply 6 is turned on, the current range is 200A, the frequency is 30kHz, and the rust removal time is 3.2min. Increasing the current and frequency can effectively reduce the rust removal time.

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Abstract

The invention discloses a high-frequency impulse and low-temperature quick derusting device comprising a derusting tank body for accommodating a derusting liquid and a workpiece. The device is further provided with an electrode plate communicated with the workpiece. The electrode plate is electrically connected with a power source. A quick derusting method using the device comprises the following steps of: 1, putting the derusting liquid into the derusting tank body, wherein the derusting liquid is prepared from 3-13wt% of 36wt% HCl, 2-7% of 98wt% H2SO4, 3-6wt% of Na3PO4 and the balance of water; 2, after the workpiece is connected with the electrode plate, immerging the workpiece into the derusting liquid in the derusting tank body; 3, turning on the power source, wherein the output current is 30-400A, the frequency is 0-30kHz and the derusting time is 3-5 minutes. The quick derusting of the workpiece is realized by the steps. The device disclosed by the invention has advantages of simple structure, low processing cost, short derusting time and high working efficiency. The device disclosed by the invention can be used for greatly reducing the preparation concentration of acid and eliminating the influence of hydrogen embrittlement on the surface of a steel piece.

Description

technical field [0001] The invention relates to the field of rust removal, in particular to a high-frequency pulse low-temperature rapid rust removal device and method, and the method is especially suitable for rust removal treatment on the surface of workpieces in an aluminizing process. Background technique [0002] In industries closely related to metals such as engineering construction, petrochemical industry, shipbuilding, and electric power smelting, it has always been a difficult problem to effectively remove the rust layer on the metal surface, especially the surface rust removal treatment before steel electroplating and coating is necessary. craft. At present, the rust removal methods on the steel surface mainly include mechanical rust removal and chemical rust removal. Mechanical rust removal (shot peening method, high-pressure water jet method, etc.) is prone to dust and noise, has low rust removal efficiency, damages the steel surface, and may have excessive dep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F1/06C25F7/00
Inventor 费新成刘凤生韩孟岩张雷陈学辉刘丹
Owner HUBEI PROVINCIAL COMM INVESTMENT FOUR ADVANTAGE STEEL TECH
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