What Is Black Oxide Coating? 3 Advantages of Black Oxide Coating

What Is Black Oxide Coating? 3 Advantages of Black Oxide Coating

Black Oxide Coating, also referred as Chemical Blacking is a conversion coating for metals to achieve a protective layer on the metal surface through a chemical reaction when a metal is placed in an electrolytic bath.

These oxide salts include proprietary penetrates, catalysts, activators, and additives that participate in chemical reactions. This chemical reaction forms black iron

oxide, magnetite (Fe3O4) on the surface of the metal to be coated. Oxidized black has a variety of unique characteristics and advantages and can be used in a variety of industries. Many metal finishing companies offer black oxide coating services to industries like automotive, defense, oil & gas, etc.

3 Types of Black Coating Oxide/ Chemical Blacking • Hot Black Oxide: At 141°C (286°F), a thermal bath of sodium hydroxide, nitrate, and nitrite is used to convert the metal surface into magnetite (Fe3O4). Water should be added to the bathroom regularly and proper control should be carried out to prevent steam explosions.

• Mid Temperature Oxide: Like hot black oxidization, the mid-temperature oxide black process will convert the metal surface into magnetite (Fe3O4). However, moderate temperature black oxide will turn black at 220 to 245°F (104 to 118°C), much lower than hot black oxide.

• Cold Black Oxide: Generally, applied at room temperature (65–85° F).This is not an oxide conversion coating process, but a deposited copper-selenium compound.

Below are some advantages of black oxide coating or chemical blacking: • Material Stability • Lubricated Functionality • Corrosive Impermeability

Contact Details Address: 429 Dewitt Rd., Unit 12 Stoney Creek, Ontario, L8E 4C3 Phone: 289-448-0277 Email: sales@peregrinemetalfinishing.com Website: https://www.peregrinemetalfinishing.com/