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Key Points Of The Surface Plating Process Of Fasteners

Jul. 17, 2019

Carbon Steel Machine Screws Supplier today would like to share with you the plating process of fasteners.


Screw fasteners generally require surface treatment such as plating. For example, the Hex Tap Screws we usually see just need plating.


Carbon Steel Machine Screws Supplier


The electroplating immerses the electroplated member in an aqueous solution containing the deposited metal compound, and current is passed through the plating solution to cause the electroplated metal to be deposited and deposited on the member. Generally, electroplating is performed by galvanizing, copper, nickel, chromium, copper-nickel alloy, etc., and boiled black (blue), phosphating, and the like are sometimes included. Different deposition methods use different ways of depositing the coating on the surface of the fastener. The plating metal is not uniformly deposited on the peripheral edge during plating, and a thicker coating is obtained at the corner. In the threaded portion of the fastener, the thickest coating is on the crest of the thread, gradually thinning along the side of the thread, depositing the thinnest at the bottom of the tooth, while hot dip galvanizing is just the opposite, thicker coating is deposited inside the corner and At the bottom of the thread, the mechanical plating of the plated metal tends to be the same as that of hot dip coating, but is smoother and much more uniform over the entire surface.


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