Surface Treatment of Screws: Difference between Trivalent Chromate and Electroless Nickel Plating

Here.Numerous plating　(which is an option for thread surface treatment), which is utilized for screws in theDifference between trivalent chromate and electroless nickel platingHere is a note about "The

The fact of the matter is,Trivalent chromate treatment has by far the larger bolt lineup(In the case of electroless nickel, the size is often limited.) You may not be troubled by this, but if you are troubled when there is no specification from the customer, please refer to the note here to make your selection.

Trivalent chromate treatment

feature

Trivalent chromate treatment,Chromate is usedThis is a method of treating steel surfaces by It is mainly used to enhance corrosion protection. It is considered environmentally friendly,Less toxic than hexavalent chromiumIt is.

Advantages

• Highly effective in preventing rust
• Relatively inexpensive processing
• Thin film with little change in bolt dimensional accuracy

demerit

• Low abrasion resistance
• Limited effectiveness when a thick film is required

Trivalent Chromate is a surface treatment different from plating

Trivalent chromate treatment,By forming a thin chromate film on the metal surface,Treatment method to improve corrosion resistanceIs. It is mainly applied over zinc or zinc alloy plating, vs.Plating is a technique to form other metal layers on a metal surface using methods such as electroplating or chemical plating.So, the main objectives are,Improved corrosion resistance, decoration, reduced friction, improved electrical conductivitySuch as.

Trivalent chromate treatment is mainly intended to improve corrosion resistance, whereas plating is intended to improve not only corrosion resistance but also decoration and functionalityThe two are used as Both are used to improve the performance of metals, butTrivalent chromate treatment and plating are different technologiesThe objectives and methods differ in

Electroless nickel plating

feature

Electroless nickel plating is,Using chemical reactionsThis method forms a uniform nickel film on the metal surface.Because plating is performed without electricity, a film of uniform thickness can be formed even on complex shapes.

Advantages

• High corrosion and wear resistance
• Uniform plating is possible,Applicable to parts with complex geometriesbe made
• High hardness and durability

demerit

• Higher cost than trivalent chromate treatment
• Treatment processes are complex and can be difficult to control

Electroless nickel plating is a plating classification

For more information on electroless nickel, click here:Types of plating commonly used and their characteristics

Summary of basic concepts from a design perspective

Trivalent chromate:To obtain rust-preventive effects while keeping costs downand dimensional changes should be avoided.

Electroless nickel plating:Applications requiring relatively high durability and abrasion resistance or complex shapesSuitable for parts of the

From the above,If the application is clear, it is necessary to specify the treatment, but if there is no specification, trivalent chromate with many size options is usedI think.

That's it.