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4 drywall screws 4 drywall screws

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  • The management system of the rinsing water after the steel wire pickling should be regularly and regularly discharged after the rinsing water, and the rinsing water should be kept clean and low acid value as far as possible. The pH control is more appropriate. The concentration of plating aid should not be too high. Hot plating wire must be added ammonium chloride and zinc chloride according to the data of laboratory analysis, and the specific gravity of the composite solution is controlled in the range of 50~80g/L. The addition of ammonium chloride or zinc chloride raw materials without the results of laboratory analysis shall be subject to criticism and education, and economic treatment if necessary.

    4 drywall screws

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    4 drywall screws 4 drywall screws

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  • 4 drywall screws

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    4 drywall screws 4 drywall screws

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  • 4 drywall screws

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    4 drywall screws 4 drywall screws

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  • Paint on the galvanized layer, the binding force between each other and the baking temperature of the paint has a great relationship, after galvanized coating alkyd paint, adhesion is no problem. Galvanized amino paint, paint adhesion is not good. Do two bottom two surface, adhesion is ok, if the two bottom two surface to two bottom three surface, that is, more paint, more baking once, again test adhesion is very poor, poor to the paint from the galvanized layer of pieces torn off.

    4 drywall screws

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    4 drywall screws 4 drywall screws

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  • Post time: 18-05-22

    4 drywall screws

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    4 drywall screws 4 drywall screws

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  • 4 drywall screws

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    4 drywall screws 4 drywall screws

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  • 4 drywall screws

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    4 drywall screws 4 drywall screws

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