Step 1 – The metal is heated until it reaches a high temperature. When the material reaches the high temperature, a great heat intensity is applied to the area that requires hardening. When the steel begins to turn red, it is time for the next step.
Step 2 – The steel is then placed into cool water to reduce the temperature. At that point, the steel is very hard but has the chance to shatter easily.
Step 3 – This step begins the second phase of tempering the steel. Once again, the steel is re-heated until it turns the correct blue color. Once the metal turns blue, this signifies the final stage of heating has been completed.
Step 4 – The last step of hardening is to let the steel cool down on its own. Once the steel has properly cooled down, the hardening process has been completed.
Chrome plating (less commonly chromium plating), often referred to simply as chrome, is a technique of electroplating a thin layer of chromium onto a metal object. The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness. Sometimes, a less expensive imitator of chrome may be used for aesthetic purposes.
Zinc-Nickel electroplating is an acid coating that is used in the protection of steel, cast iron, malleable iron, copper, and brass. Zinc-Nickel is recognized as an environmentally safe alternative to cadmium electroplating. In specific applications, Zinc-Nickel demonstrates equivalent, or better, corrosion properties when compared to cadmium. Zinc-Nickel is normally applied for corrosion protection purposes, and functions as a "sacrificial coating", corroding before the base material. Zinc-Nickel can also replace cadmium in galvanic interaction applications where the coating is intended to minimize corrosion caused by the interaction of dissimilar metals. be used for aesthetic purposes.