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HDG Slotted Head Screw Wholesale Price introduces the plating knowledge of screws

  • Categories:Industry News
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  • Time of issue:2021-11-16
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(Summary description)The quality of screw plating is mainly measured by its corrosion resistance, followed by appearance. Corrosion resistance is to imitate the working environment of the product, set it as the test condition, and conduct a corrosion test on it.

HDG Slotted Head Screw Wholesale Price introduces the plating knowledge of screws

(Summary description)The quality of screw plating is mainly measured by its corrosion resistance, followed by appearance. Corrosion resistance is to imitate the working environment of the product, set it as the test condition, and conduct a corrosion test on it.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-11-16
  • Views:0

The quality of screw plating is mainly measured by its corrosion resistance, followed by appearance. Corrosion resistance is to imitate the working environment of the product, set it as the test condition, and conduct a corrosion test on it. The quality of screw electroplating products is controlled from the following aspects. Let's take a look at the editor of HDG Slotted Head Screw Wholesale Price!
1. Appearance
The surface of the product is not allowed to have partial non-plating, scorching, roughness, dullness, peeling, skinning, and obvious streaks, and no pinhole pitting, black plating slag, loose passivation film, cracking, shedding and serious Passivation marks.


2. Coating distribution
With different deposition methods, the way the plating layer accumulates on the surface of the fastener is also different. During electroplating, the coating metal is not uniformly deposited on the outer peripheral edge, and a thicker coating is obtained at the corners. In the threaded part of the fastener, the thickest coating is located on the top of the thread, and gradually becomes thinner along the side of the thread, and the thinnest deposit is deposited at the bottom of the tooth. Hot-dip galvanizing is just the opposite. The thicker coating is deposited on the inner corners and At the bottom of the thread, the metal deposition tendency of the mechanical plating is the same as that of the hot-dip plating, but it is smoother and the thickness is much more uniform on the entire surface.
3. Adhesion
Cut or pry off with a solid tip and considerable pressure. If the coating is peeled off in a flake or skin shape before the tip of the knife, so that the base metal is exposed, it should be considered that the adhesion is not enough.
The above is the editor of HDG Slotted Head Screw Wholesale Price: a brief introduction to the knowledge of screw electroplating.

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