Well-designed ASTM A490 A490M Heavy Hex Structural Bolt to Moldova Manufacturers

ASTM A490 A490M Heavy Hex Structural Bolts The bolts are intended for use in structural connections. These connections are covered under the requirements of the Specification for Structural Joints Using ASTM A490 Bolts, approved by the Research Council on Structural Connections, endorsed by the American Institute of Steel Construction and by the Industrial Fastener Institute.   Dimension: ASME B18.2.6, ASME/ANSI B18.2.3.7M Inch Size: 1/2"-1.1/2" with various length Metric Size: M12-M36 with various length Grade: ASTM A490 A490M Type-1 Finish: Black Oxide, Zinc Plating, Dacromet, and so on Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality and Strict Quality Control, Competitive price,Timely delivery; Technical support, Supply Test Reports Please feel free to contact us for more details.

  • Well-designed ASTM A490 A490M Heavy Hex Structural Bolt to Moldova Manufacturers Related Video:



    We show you how to galvanize metal objects to protect them rust.

    First we get 30g of zinc sulfate and dissolve it into 100mL of water.

    Zinc sulfate was made back in our video on making a copper sulfate and
    zinc battery: https://www.youtube.com/watch?v=Id3tL2iI0Vw

    Then connect the item you want to galvanize to the negative terminal of a 5 volt power supply. Connect the positive terminal to a strip of zinc metal.

    Zinc metal was obtained from our video on getting useful materials from batteries: https://www.youtube.com/watch#%21v=knc1lSupAwQ

    Immerse both electrodes into the zinc sulfate solution and keep them from touching. Then turn on the current and run it for about one minute to give the metal a zinc coating.

    Remove the object and now it’s galvanized.

    To test the rust protection, place it on top of a paper towel soaked in saltwater. You should also place an unprotected item next to it for a good comparison. Cover the towel to prevent evaporation and wait a day or two.

    The treated object should remain rust-free, perhaps developing a white crusty coating. The untreated object should start to rust.



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