- Clipping hairs with a small pair of facial scissors is an option for women with few unwanted hairs. - Chemical depilatories (hair removal creams) are another option for hair removal. However, their major drawback is that many individuals find them too irritating to the skin. Bleaching creams may be used to camouflage hair instead of actually removing the hair.
Black oxide is a conversion coating formed by a chemical reaction produced when parts are immersed in the alkaline aqueous salt solution operated at approximately 285 degrees F. The reaction between the iron of the ferrous alloy and the hot oxide bath produces a magnitite (Fe3 O4) on the actual surface of the part.
Steel is blackened with heat, chemicals or a combination of both. Steel has two oxides: red and black. Red oxide is what we know as rust. It is corrosive and destructive.Black oxide provides a protective, abrasion-resistant coating that prevents rust formation.Depending on the method used, black oxide can be applied in an even finish.eat the item with a torch until it begins to smoke and turn black. Spray the item with penetrating oil until it is dripping wet. Heat the item again until it begins to smoke. The petroleum molecules will react with the molecules of heated steel to form a chemical bond, thus sealing the metal.