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Magnesium alloy surface anticorrosion method

A magnesium alloy, phosphate technology, applied in the direction of metal material coating process, etc., can solve problems such as increased cost and operation process

Inactive Publication Date: 2015-01-21
黄忠波
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] Magnesium and magnesium alloys are active metals, which are easy to corrode in the natural environment. There are currently three main solutions to the corrosion of magnesium and magnesium alloys. The first is to apply anti-corrosion coatings, and the second is to use electroplating corrosion-resistant metals. The third is solved by alloy method, but for most magnesium alloys, anti-corrosion treatment is also required
For the first and second treatment methods, rust removal treatment is carried out before anti-corrosion treatment, that is, the rust or oxide layer on the metal surface is removed with a rust remover, and then coated with anti-corrosion materials or electroplating, this method increases Cost and Operating Process

Method used

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Embodiment Construction

[0011] The technical solutions of the present invention are described in detail below through specific examples.

[0012] A method for anticorrosion of a magnesium alloy surface, comprising the following steps:

[0013] 1) preparing phosphoric acid and phosphate solution with a concentration of 32-35%, placing the magnesium and magnesium alloy to be treated in the solution for 36-60 hours; the molar ratio of phosphoric acid and phosphate is 1:2;

[0014] 2) Heating the metal surface to be treated with low-pressure steam, the heating temperature is 130-150° C., and the heating time is 10-20 hours.

[0015] The phosphate is one of diammonium hydrogen phosphate, ammonium dihydrogen phosphate or ammonium phosphate; preferably diammonium hydrogen phosphate.

[0016] In this technical solution, the permeability of molecules is mainly used. Phosphate molecules penetrate into the interior of magnesium and magnesium alloys, and then heated by steam, phosphate and magnesium react to fo...

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Abstract

The invention relates to a magnesium alloy surface anticorrosion method. The method comprises: preparing 32-35% phosphoric acid and a phosphate solution, placing magnesium or a magnesium alloy which needs to be treated in the solution for 36-60h, and heating the surface of the to-be-treated metal by adopting low-pressure steam, wherein a heating temperature is 130-150 DEG C, and heating time is 10-20h.

Description

technical field [0001] The invention belongs to the technical field of derusting metal surfaces, in particular to a method for anticorrosion of magnesium alloy surfaces. Background technique [0002] Magnesium and magnesium alloys are active metals, which are easy to corrode in the natural environment. There are currently three main solutions to the corrosion of magnesium and magnesium alloys. The first is to apply anti-corrosion coatings, and the second is to use electroplating corrosion-resistant metals. The third solution is to use alloys, but most magnesium alloys also require anti-corrosion treatment. For the first and second treatment methods, rust removal treatment is carried out before anti-corrosion treatment, that is, the rust or oxide layer on the metal surface is removed with a rust remover, and then coated with anti-corrosion materials or electroplating, this method increases cost and operating process. Contents of the invention [0003] The purpose of the p...

Claims

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Application Information

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IPC IPC(8): C23C22/07C23C22/73
CPCC23C22/07C23C22/73
Inventor 黄忠波
Owner 黄忠波