waterproof drywall screws

Can adapt to the change of the slope without being damaged, than the rigid structure has a very good safety and stability;

The key and important parts with tensile strength greater than 1034Mpa should be relieved of stress at 200±10℃ for more than 1 hour before plating, and the carburized or surface hardened parts should be relieved of stress at 140±10℃ for more than 5 hours. The cleaning agent used for cleaning shall have no effect on the binding force of the coating and no corrosion on the substrate. Acid activation Acid activation solution should be able to remove corrosion products and oxide film (skin) on the surface of parts without excessive corrosion on the matrix.

Galvanizing is a process of coating a metal surface with zinc in an electrochemical reaction on the metal surface to improve the corrosion resistance of the metal. Wire drawing is a process in which metal materials are drawn by mechanical methods to reduce their cross-sectional area and increase their length. So, the combination of galvanized to wire drawing two processes, what impact on the performance of the product?

Appellation: Hook fence net is a variety of fence net. The diameter of the opposite side of each mesh is generally 6.5cm-14cm. The diameter of the wire used is generally from 3.5mm to 6mm. Wire material is generally Q235 low carbon wire. The iron wire is welded into black pieces of decorative hook mesh by ginning. The overall size of the mesh is 1.5 m X4 m, 2 m X4 m, 2 m X3 m. The general surface treatment is cold (electric) galvanized treatment. There are also hot dip galvanizing, dipping, spray. But overall, 99 percent is cold (electric) galvanized.

There is no adhesion test of powder spraying or fluorocarbon spraying on packaged galvanized wire, but there are two points for reference: first, in sealed or air-free environment, non-metallic volatiles can corrode zinc coating; Second, zinc at higher than 230 degrees (c) will cause the matrix metal brittle. And powder spraying and fluorocarbon spraying are to be baked at a higher temperature and in a sealed environment, causing rapid corrosion of zinc, resulting in loose corrosion film resulting in coating adhesion decline, and even lead to (matrix) steel wire brittle situation may exist.

Fundamental things and its importance 

-15 °C to + 180 °C