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Zinc coating thickness

Zinc coating thickness is the surface of the zinc and the total thickness of the zinc alloy coating, expressed in km. Local thickness of the zinc coating, the arithmetic mean of a number of basic measuring surface as required by law the measured magnetic coating thickness measurement or coating measured by weighing the amount of the thickness of the plating method translated value. The average thickness of the zinc coating, after a large group or a galvanized coating sample measured local thickness of the arithmetic mean.

Zinc coating thickness has a variety of methods, such as, the total coating thickness, the local thickness of the coating, the average thickness of the coating and the like. Zinc coating thickness will determine the plating corrosion resistance. Can be selected above or below the standard zinc coating thickness. 3mm below the surface of the steel sheet is smooth, the industrial production of thicker coating is difficult to obtain, in addition, the thickness of the steel is not commensurate with the zinc coating thickness may affect the coating adhesion to the substrate and the coating appearance. The coating is too thick will cause the coating appearance of rough, flaky, plating can not withstand handling and installation of a collision.

Zinc coating thickness is connected with workpiece thickness, but is usually as follows:
Thickness of the workpiece is greater than or equal to 6 mm, the average thickness is greater than 85 microns, 70 microns is greater than the local thickness;
Less than 6 mm thickness of the workpiece is greater than 3 mm, the average thickness is greater than 70 microns, the local thickness is greater than 55 microns;
Greater than the thickness of the workpiece is less than 1.5 mm, the average thickness of 3 mm should be greater than 55 microns, 45 microns should be greater than the local.

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