What surface pretreatment does aluminum alloy profile need to do?

Aluminum alloy profiles have been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding, construction, decoration and chemical industry. With the rapid development of science and technology and industrial economy in recent years, the demand for welded structural parts of aluminum alloy is increasing day by day, which makes the research on the weldability of aluminum alloy deepen.

(1) brightening The process of brightening the metal surface by chemical or electrochemical polishing.

(2) bright dipping metal is dipped in the solution to make the metal surface bright.

(3) polishing to reduce the roughness of metal surface.

(4) Soft wheel polishing buffing metal surface is polished by rotating soft wheel. The abrasive used on the wheel is suspension, paste or viscous grease containing fine abrasive particles.

(5) electrobrightening The metal surface is brightened by appropriate electrolytic treatment.

(6) electrolytic polishing electropolishing aluminum is used as the polishing treatment of the anode in a proper electrolyte.

(7) electrolytic etching electrolytic etching of aluminum in an appropriate solution.

(8) chemical brightening Aluminum is immersed in the solution to brighten its surface.

(9) chemical polishing chemical polishing aluminum is immersed in a chemical solution for polishing.

(10) degreasing Remove the grease on the surface by mechanical, chemical or electrolytic methods.

(11) pickling with acid removes oxides or other compounds on the surface by chemical action (usually in acid).

(12) cleaning with weak acid, weak alkali solution, solvent and its vapor, and removing surface grease and dirt. This treatment can be chemical or electrolytic.

(13) desmutting removes the ash attached to the aluminum surface (for example, the treatment that aluminum is immersed in nitric acid solution after alkali washing is commonly known as light emission).

(14) deoxidizing to remove oxides on the surface.

(15) etching, the surface of etch metal material is in acidic or alkaline solution, and it is roughened due to the total or partial dissolution of the surface. The acid etching process can be carried out with or without electricity. This method can also be used in special production processes such as electrolytic capacitor aluminum foil, printed circuit board and decorative structure.

(16) A method of mechanical cleaning by brushing the brushing surface, usually with a rotating brush.

(17) Polishing The process of removing surface substances by using abrasives attached to rigid or flexible objects.

Belt polishing (18) Belt polishing is a method of mechanically treating aluminum parts, in which the aluminum parts are in frictional contact with circular strips with abrasives.

(19) Drum Polishing tumbling In order to improve the smoothness of metal surface, aluminum parts are processed in batches in a drum (with or without abrasive or shot).

(20) abrasive blasting: A treatment method of shooting corundum or glass sand at the surface of an object with air flow. Fine abrasives suspended in water or other liquids can also be used for spray grinding (wet spray or steam spray).

(21) shot blasting is a treatment method of spraying hard and small balls (such as metal balls) on the metal surface.

(22) glass bead blasting: A treatment method in which fine spherical glass beads are sprayed on the metal surface to clean or harden the surface.

(23) sand blasting Sand or alumina is used for blast grinding.

(24) wet blasting liquid honing sprays water slurry containing abrasive to the workpiece at high speed to clean or finish its surface.

(25) activation surface changes from passive state to active state.

(26) The phenomenon that the dye adsorption capacity of reactivation (of an anodic oxide coating) anodic oxide film is increased after acid treatment.

(27) stripping with a suitable chemical solution to remove the anodic oxide film on the metal surface.

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