What is black carbon steel?

steel is an alloy or a mixture of iron with carbon and a small amount of other metals. Clean iron can be melted and shaped, but tends to be soft. The addition of carbon strengthens metal and most carbon steels contain one to two percent of the carbon. Black carbon steel is formed during the production process when high temperatures create a thin layer of oxidized iron on the outer surface.

carbon bonds chemically connect with iron in steel alloys and create much heavier material than clean iron. As the carbon content increases, the material becomes heavier, but fragile or prone to breaking under stress or load. Steel containing carbon in an amount of more than 2% is considered to be cast iron; This can be used for pipes and non -structural materials, but is considered too fragile for structural steel.

Iron easily reacts with oxygen in the air and creates iron or rust oxide that causes parts failure, so that it often covers to prevent surface rust. One of the benefits of the blackNo carbon steel is the property of the natural anti -corrosion properties of black iron oxide coating, as oxide acts as a barrier to prevent oxygen from the iron below. The thin oxide layer is created at high temperatures and creates a resistant layer that requires no additional treatment or coating.

For applications where corrosion protection is critical, carbon steel can be painted or galvanized. The steel is galvanized by acid and then soak the steel into a molten zinc bath. Zinc forms a layer on the outside of the steel and will first corrode when exposed to air or humidity. Galvanization will improve the working life of steel parts, but is not used on black carbon steel because the oxide layer is already protecting steel.

black carbon steel is often used for gas or water pipes because it has low costs and can be welded using conventional methods. Some long -distance pipesThey used black carbon teel, as the pipes can be connected in the field and will not resoccate quickly. Black carbon steel can be used in climate or ground conditions that can speed up corrosion, but further protection such as anodes may be required. The anodes are buried rods made of zinc that first corrode when connected to a steel tube.

Dishes can be called black steel, but dark color is a product of oil treatment called spices rather than production. Carbon steel is often covered with oil to prevent rust, and steel dishes can be oiled and heated to absorb oil molecules. The steel darkens and acquires some first -class properties, but the spice is a temporary coating and must be repeated regularly.