Why do CNC precision parts need surface treatment?

To Prevent Corrosion Simply Improve Appearance, Engineers Often Specify Additional Finishing Processes For Some All Of The Exterior Surfaces Of A CNC Precision Part After The Metal Part Has Been Machined  Fabricated .

Additionally, Some Of These Treatments Provide Enhanced Mechanical Electrical Properties That Contribute To The Overall Functionality Of The Component.

1. Improve Product Precision: After Parts Processing , Some Products Have Rough Surfaces, Which Will Leave Large Residual Stress, Which Will Reduce Product Precision Affect The Matching Accuracy Between Parts. In This Case, Product Surface Treatment Is Required.

2. Provide Product Wear Resistance; If The Parts Are Usually Used In Interaction With Other Parts, Long-Term Use Will Increase The Wear Of The Parts. In This Case, The Product Surface Needs To Be Processed To Extend The Service Life Of The Parts. Huiwen Zhizao Is A Machining Factory With More Than Ten Years Of CNC Machining Experience . It Has A Full Range Of Equipment, CNC Lathe/Milling/Grinding/Drilling/Machining. Partners With Parts Processing Needs Are Welcome To Call Us For Quotation.

3. Improve The Corrosion Resistance Of The Product: Parts Used In Highly Corrosive Places For A Long Time Require Special Surface Treatment, Such As Polishing, Grinding, Spraying Of Anti-Corrosion Materials. This Can Improve The Corrosion Resistance Service Life Of The Product.

Whatever The Reason, Each Of These Eight Metal Surface Finishing Processes Plays An Important Role In The Manufacturing Process:

1. Anodizing

There Are Type I, Type II Type III Anodizing. Anodizing Is An Electrolytic Passivation Process Used To Increase The Thickness Of The Natural Oxide Layer On The Surface Of Aluminum Parts. The Aluminum Parts Are The Anodes (Hence The Name "Anodized"), An Electric Current Is Passed Between Them The Cathode (Usually A Flat Aluminum Rod) Through The Above Electrolyte (Most Commonly Sulfuric Acid). The Main Functions Of Anodizing Are To Increase Corrosion Resistance, Wear Resistance, Adhesion To Paints Primers, Etc.

2. Metal Plating

Metal Plating Is A Technique A Chemical Bath Is Used To Coat Alter The Surface Of A Substrate With A Thin Layer Of Metal, Such As PTFE Nickel. While Electroplating Techniques Generate An Electric Current To Diffuse The Substrate, Electroless Plating Employs An Autocatalytic Practice The Substrate Acts As A Catalyst In The Reaction. It Offers Many Advantages Such As Improving The Durability, Corrosion Resistance, Surface Friction, Appearance Of The Product. Apart This, It Is Also A Useful Option For Coating Other Metals.

3. Chemical Plating

The Process Involves Applying A Uniform Layer Of Metal To A Substrate Without The Need For An Electrical Charge. Nickel Is Often Used For This Process Because It Provides A Uniform Thickness On The Substrate, Even On Irregularly Shaped Objects. Chemical Plating Is An Important Process For Improving Corrosion Resistance, Oxidation Resistance, Wear Resistance. Huiwen Zhizao Is A Machining Factory With More Than Ten Years Of CNC Machining Experience. It Has A Full Range Of Equipment, CNC Turning/Milling/Grinding/Drilling/Machining. Partners With Parts Processing Needs Are Welcome To Call Us For A Quote.

4. Passivation

It Is A Process Used To Improve The Surface Condition Of Stainless Steel By Dissolving Iron Embedded In The Surface Through Forming, Machining  Other Manufacturing Steps. This Is Achieved By Placing The Stainless Steel In An Acid Solution To Dissolve The Remaining Iron Form A Thin Oxide Layer On The Surface. It Improves Corrosion Resistance Maintains Dimensional Integrity Of Close Tolerance Parts.

5. Powder Coating

Powder Coating Involves Melting Dry Plastic Powder Onto Metal To Create A Textured, Matte Glossy Coating. It Applies The Powder To The Metal Electrostatically Then Cures It Under Heat, Causing It To Flow Form A Hard "Skin".

6. Heat Darkening

This Is A Process That Involves Using A Machine To Apply A Thin Layer Of Black Oxide To The Surface Of The Product To Create A Matte Black Finish With High Wear Resistance. Thermal Blackening Is A High Temperature Process The Product Is Inserted Into A Series Of Tanks Filled With Etchants, Cleaners Coolants.