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Corrosion inhibition treatment method for magnesium alloy in sodium chloride solution

A technology of sodium chloride solution and treatment method, which is applied in the field of corrosion inhibition treatment of magnesium alloys, can solve problems such as poor corrosion resistance and limitations, and achieve the effects of improving corrosion resistance, low cost, and simple preparation process

Inactive Publication Date: 2015-05-13
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the electrode potential of metal magnesium is very negative (-2.36V), its poor corrosion resistance limits its application to a large extent. Improving and improving the corrosion resistance of magnesium alloys is the key to solving the bottleneck of magnesium alloy applications. one

Method used

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  • Corrosion inhibition treatment method for magnesium alloy in sodium chloride solution
  • Corrosion inhibition treatment method for magnesium alloy in sodium chloride solution
  • Corrosion inhibition treatment method for magnesium alloy in sodium chloride solution

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Embodiment

[0014] (1) Grind the AZ91 magnesium alloy with a size of 30mm×20mm×3mm successively with 600#, 800#, 1000# water-resistant sandpaper, after washing with water, degrease in alkaline degreasing solution at 70°C for 20 minutes , and then ultrasonically cleaned in deionized water at 70°C for 15 minutes, washed with water, and dried for later use. The formula of the alkaline degreasing liquid is: sodium phosphate 40g / L, sodium silicate 15g / L, sodium carbonate 40g / L.

[0015] (2) Prepare 100 ml of an aqueous solution of triethanolamine with a concentration of 1 ml / L, and stir it magnetically for 0.5 hours at 25°C, and the solution becomes transparent.

[0016] (3) Immerse the magnesium alloy treated in step (1) in the solution obtained in step (2), take it out after soaking it for 1 hour at 25°C, wash it twice with deionized water to remove the remaining solution on the surface, and dry it to obtain a surface with The magnesium alloy of the triethanolamine adsorption layer, that is...

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Abstract

The invention discloses a corrosion inhibition treatment method for a magnesium alloy in a sodium chloride solution. The method comprises the following steps: sanding the magnesium alloy with waterproof abrasive paper, washing with water, carrying out oil removal at 70-80 DEG C in an alkaline oil removal solution, carrying out ultrasonic cleaning in 70-80-DEG C deionized water, washing with water, and blow-drying for later use, wherein the alkaline oil removal solution is composed of 30-50 g / L sodium phosphate, 10-20 g / L sodium silicate and 30-50 g / L sodium carbonate; preparing a 1-5 ml / L triethanolamine water solution, and magnetically stirring at 25 DEG C for 0.5 hour; and immersing the treated magnesium alloy in a triethanolamine water solution at 25 DEG C for 0.5-3 hours, taking out, washing with deionized water 2-3 times, and blow-drying, thereby completing the corrosion inhibition treatment of the magnesium alloy. The method is efficient and cheap, can well enhance the corrosion resistance of the magnesium alloy in the sodium chloride solution, and can not pollute the environment and equipment.

Description

technical field [0001] The invention belongs to the field of metal material surface corrosion and protection, in particular to a corrosion inhibition treatment method suitable for magnesium alloys in sodium chloride solution. Background technique [0002] Magnesium alloys are widely used in automobiles, electronics, chemicals, metallurgy, communications, aviation and many other application fields due to their excellent properties. However, because the electrode potential of metal magnesium is very negative (-2.36V), its poor corrosion resistance limits its application to a large extent. Improving and improving the corrosion resistance of magnesium alloys is the key to solving the bottleneck of magnesium alloy applications. one. At present, the methods for anti-corrosion treatment of magnesium alloy surface mainly include: chemical conversion method, electroless nickel plating, anodic oxidation, organic coating, corrosion inhibition treatment, etc. Among many anti-corrosion...

Claims

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Application Information

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IPC IPC(8): C23F11/14C23G1/22
Inventor 尚伟何楚斌温玉清覃炎运郭荣蒙术定
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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