A corrosion inhibition treatment method for inhibiting the corrosion of 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 for inhibiting the corrosion of magnesium alloys in sodium chloride solution, can solve problems such as endangering human health and living environment, and achieve improved surface corrosion resistance and high impedance , the effect of low corrosion current density
Active Publication Date: 2016-01-13
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
Although some corrosion inhibitors have a good effect on the corrosion inhibition of magnesium alloys, their application is limited to a certain extent because they seriously endanger our human health and living environment.
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[0011] (1) Grind the AZ91 magnesium alloy with a size of 40mm×30mm×2mm successively with 300#, 600#, 1000# water-resistant abrasive paper, wash with water, and degrease with alkaline degreasing solution (at 50°C at 30~ Alkaline washing in 60g / L NaOH solution for 3 minutes), then washing with water, ultrasonic cleaning in distilled water for 10 minutes, washing with deionized water, and drying for later use.
[0012] (2) Prepare 100ml of polyethylene glycol 200 with a concentration of 3ml / L, and stir magnetically at 25°C for 0.5 hours, and the solution becomes transparent.
[0013] (3) Immerse the magnesium alloy treated in step (1) into the solution obtained in step (2), soak it at 25°C for 1 hour, take it out, wash it twice with deionized water to remove the remaining solution on the surface, and dry it to obtain a surface with Magnesium alloy with polyethylene glycol 200 adsorption layer.
[0014] The results of SEM characterization showed that a dense adsorption film was f...
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The invention discloses a corrosion inhibition treatment method for inhibiting the corrosion of magnesium alloy in sodium chloride solution. (1) Grind the magnesium alloy step by step with 300#, 600#, 1000# water-resistant abrasive paper, wash with water, degrease with alkaline degreasing solution, wash with water, and ultrasonically clean in distilled water for 10? Minutes, rinse with deionized water, and blow dry for later use. (2) The preparation concentration is 1-5? ml / L polyethylene glycol 200, magnetically stirred at 25°C for 0.5 hours, the solution was transparent. (3) Immerse the magnesium alloy treated in step (1) into the solution obtained in step (2), soak it at 25°C for 1-2 hours, take it out, wash it with deionized water 2-3 times to remove the solution remaining on the surface, and blow dry After obtaining the magnesium alloy with polyethylene glycol 200 adsorption layer on the surface 。 The invention has the advantages of abundant raw material sources, low price, non-toxicity, high efficiency, and no environmental pollution. The prepared adsorption film layer has high impedance, low corrosion current density, and dense surface, which can well improve the anti-corrosion ability of the magnesium alloy surface. .
Description
technical field [0001] The invention relates to the field of electrochemical corrosion on the surface of metal materials, in particular to a corrosion inhibition treatment method for inhibiting the corrosion of magnesium alloys in sodium chloride solution. Background technique [0002] Magnesium alloys are widely used due to their high specific strength, strong chemical activity, impact resistance, damping and vibration reduction, good thermal and electrical conductivity, electromagnetic shielding and stability, excellent processability and easy recycling. Automobile, electronics, chemical industry, metallurgy, communication, aviation and many other application fields. Moreover, magnesium alloy is the lightest structural metal in industrial applications, and is known as "the green engineering material of the 21st century". However, because the potential of the magnesium electrode is very negative (-2.36V), its poor corrosion resistance limits its application to a large exte...
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IPC IPC(8): C23C26/00
Inventor 尚伟温玉清
Owner GUILIN UNIVERSITY OF TECHNOLOGY