What is the Black Steel?

The time of issue:2013-12-27 8:45:49       Author:

In fact, the black steel pipe is the ordinary steel. To increase the corrosion resistance properties of the steel, the steel surface apply blackening with medicament. In general, the iron and steel is processed into a variety of practical tools. All kinds of fasteners still need a galvanized or blackening process after heat treatment, which will increase the anti-corrosion performance of workpiece. The traditional blackening process belongs to alkaline blackening in high temperature, and it has disadvantages of severe work conditions, low efficiency, high energy consumption, many manufacturers have to switch to blackening process in normal temperature. But because of the reasons that it has loose membrane layer, low adhesion, uneven color and lustre, the former and post-processing becomes complicated. The solution is not stable, the metal selenium is highly toxic, and the antirust effect still cannot be improved, the development and promotion of the blackening in room temperature is hindered.

Blackening technology with residual heat is applying work piece tempering heat to conduct blackening. It not only solved the problem of bad film bonding force in normal temperature blackening, but also used tempering heat to achieve the effect of high temperature blackening, reducing the energy consumption. The blackening liquor is neutral, the pretreatment and post-treatment is very simple and easy to operate, it is a new blackening technology worthy of development and promotion.

The steel blackening agent use the artifacts tempering heat, form black polymer protective film basing on thermal polymerization reaction mechanism, so as to achieve the purpose of rust corrosion. The technology is environmental protection, energy saving, high efficiency, and blackening color effect is good, the gloss of membrane layer is high, it is a alternative product of traditional blackening with alkali boiling. The steel blackening agent is widely used in standard parts, chains, spring, screw, rail equipment and other steel parts processing enterprises.

The black steel can be processed into the black steel plate and the black steel pipe. Both of them have different properties and applications. Black plate is a kind of black plate, it is plated Zn- Ni when conducting blackening process on the surface, it form the coating film by coating.Tthe coating compositions contain metal ions, water soluble organic resin, the water dispersion resin, furea resin and acid. The black steel pipe is processed into the tubular shapes. There are boiler tube, petroleum cracking tube, fluid pipe, structural tube, etc. As for the price of the black steel, it depends that the steel material before blackening is good or not, the material are generally not very expensive. It is much cheaper than tungsten steel and titanium steel. The welded steel pipe and API steel pipe are also available.

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