A36 H Profile Steel

A36 H Profile Steel 800*300*14*26 Physical properties

The traditional blackening method is alkaline oxidation blackening. Alkaline oxidation blackening is usually the use of high temperature and subsalt as oxidants, so that steel parts in extremely concentrated alkaline oxidation liquid heating oxidation, so that the surface of the parts to form a layer of blue to black Fe3O4 protective oxidation film. This kind of high temperature oxidizer causes the solution content to change rapidly due to the uneven heat and high temperature when the workpiece is blackened, which often causes the phenomenon of unequal blackening film. Therefore, people are eager to seek room temperature blackening process, to save energy, reduce costs, easy operation, uniform blackening film and other purposes. The normal temperature blackening agent can effectively solve the above problems and achieve the required purpose.