The organisation of the city appears to have differed from that of other Maya sites and appears to have been geared towards a specialised coastal trade in salt.
Steel is a solid solution, a subtype of chemical mixtures that involve two or more molecules in a solid state that combine to form a single substance while retaining their individual identities. The component metals making up steel are not chemically bonded together. Continue Reading.
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.