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hollow wall screws

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hollow wall screws hollow wall screws

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  • 2. The cleaning agent used for cleaning should have no effect on the binding force of the coating and no corrosion on the matrix.

    hollow wall screws

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    hollow wall screws hollow wall screws

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  • The material of steel structure will affect the organization and thickness of hot dip galvanized film. For example, high tension steel containing silicon, carbon content is high, easy to react with molten zinc quickly, the result of excessive growth of alloying, will cause a grayish black appearance, but does not affect its corrosion resistance. Or heat treated steel, if its tensile strength exceeds 90kg/mm2, after hot dip operation, easy to reduce its strength, etc.

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    hollow wall screws hollow wall screws

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  • hollow wall screws

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    hollow wall screws hollow wall screws

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