What are the Advantages of Black Oxide Coating Services?

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.

The black oxide is a chemical conversion coating process, which means it will not be deposited on the surface of the substrate like zinc plating or nickel. These oxide salts include proprietary penetrants, 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 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. Check out them.

1. Material Stability

Unlike electroplating technology and many other corrosion-resistant techniques on the market, the black oxide method has a variety of other attractive properties and has anti-corrosion capabilities. First, if the parts are manufactured according to high tolerance engineering standards, this feature makes sense, and the process only converts the surface. It does not add to the surface. In effect, the dimensional stability is preserved.

2. Corrosive Impermeability

Black Oxide Coating provides moderate corrosion resistance, even when combined with an oil or rust-inhibiting lubricant. This makes it ideal for internal electronic device applications because the small corrosive white spots are actually conductive and can cause electrical shorts.

3. Lubricated Functionality

The black oxide coating reverses this trend by adding a matte black lubricating topcoat, a layer of slip-enhanced mechanical strength endurance. Blackening salt is designed to control the oxidation process, which is a finishing technique that protects metals from corrosion.

There are many companies that provide metal finishing services like zinc plating, electroplating, black oxide coating services, and more. You can search for a reliable metal finishing company to provide metal treatment in your industries.