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A kind of surface cleaning method of magnesium alloy ingot

A surface cleaning and magnesium alloy technology, applied in the field of magnesium alloys, can solve the problems of carbon residue, chemical composition stability problems of cast magnesium alloy parts, secondary corrosion, etc.

Active Publication Date: 2020-06-23
FOSHAN GAOMING LIGANG PRECISION CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic cleaning agents can quickly remove oil stains, but it is easy to cause carbon residues on the surface of magnesium alloy ingots, which will affect the carbon content in the parts during the subsequent casting process using ingots, and affect the stability of the chemical composition of cast magnesium alloy parts pose a major problem
However, the use of pickling or alkali cleaning will cause a certain loss to the aluminum alloy body, especially the alkali washing process, which is easy to damage the surface morphology of the magnesium alloy and cause secondary corrosion

Method used

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  • A kind of surface cleaning method of magnesium alloy ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the present embodiment, the steps of the method for cleaning the surface of the magnesium alloy ingot are as follows:

[0038] Step 1, take the raw material preparation component A according to the following components and parts by mass:

[0039] Magnesium chloride 4 parts

[0040] High silica glass fiber 6 parts

[0041] Zinc oxide 8 parts

[0042] Alkyd resin 30 parts

[0043] Magnesium Hydroxysilicate 2 parts

[0044] Sodium bisulfate 2 parts

[0045] Aluminum Potassium Sulfate 2 parts

[0046] Expanded graphite powder 4 parts

[0047] 0.02 parts of paraffin wax with carbon number of 25-30

[0048]The preparation method of alkyd resin is as follows: mix rice bran oil and n-butanol and heat up to 118°C, add dropwise saturated lithium hydroxide solution as a catalyst, continue to heat up to 250°C for 4 hours; after the reaction is completed, cool down to 118°C, and then add phthalic anhydride and ethanol, heat up to 150°C for 4 hours, after the reaction, coo...

Embodiment 2

[0055] In the present embodiment, the cleaning steps are similar to those in Example 1, except that the components and parts by mass of component A are:

[0056] Magnesium chloride 6 parts

[0057] High silica glass fiber 6 parts

[0058] Zinc oxide 7.5 parts

[0059] Alkyd resin 30 parts

[0060] Magnesium Hydroxysilicate 2 parts

[0061] Sodium bisulfate 2 parts

[0062] Aluminum Potassium Sulfate 1-part

[0063] 3 parts expanded graphite powder

[0064] 0.03 part of paraffin wax with 25-30 carbon atoms.

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Abstract

The invention discloses a surface cleaning method of a magnesium alloy ingot. The surface cleaning method comprises the following steps: step one, preparing a component A containing alkyd resin whichis self-made; step two, uniformly mixing the component A with an alkyd resin curing agent to prepare a cleaning solution; then immediately soaking a master alloy ingot obtained by casting into the cleaning solution and taking out the ingot until a coating layer is formed on the surface of the ingot, wherein the additive amount of the alkyd resin curing agent is 8 to 15 percent of the mass of the alkyd resin in the step one; step three, drying the surface of the ingot under the condition of 80 to 100 DEG C, and tearing off the cured coating layer by using external force to obtain the mother alloy ingot subjected to surface cleaning when the temperature is reduced to 30 to 40 DEG C after drying. According to the cleaning method disclosed by the invention, by means of the matching of specialmaterials and curing characteristics of polymer materials, the coating layer with certain adsorption properties and deoiling properties is formed on the surface of a to-be-treated magnesium alloy ingot; then the coating layer is torn off by using the characteristic of easily separating the coating layer from a magnesium alloy ingot body; dirt on the surface of the magnesium alloy ingot is removedwhile the coating layer is torn apart.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloys, and in particular relates to a method for cleaning the surface of a magnesium alloy ingot. Background technique [0002] Magnesium alloy is an alloy composed of other elements based on magnesium element. The characteristics of magnesium alloy are: low density, high strength, large elastic modulus, good heat dissipation performance, good shock absorption, and greater impact load capacity than aluminum alloy. Good corrosion resistance of organic matter and alkali. Its main alloying elements are aluminum, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium. At present, magnesium-aluminum alloy is the most widely used, followed by magnesium-manganese alloy and magnesium-zinc-zirconium alloy, which are mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial sectors. Cast magnesium alloy is a magnesium alloy that is formed by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/08C09D7/61
CPCC08K2003/166C08K2003/2296C08K2201/003C08K2201/004C09D7/61C09D7/70C09D167/08C08L91/06C08K13/06C08K7/14C08K7/24C08K3/22C08K3/16
Inventor 王立峰
Owner FOSHAN GAOMING LIGANG PRECISION CASTING CO LTD