Surface Treatment

Electrochemical oxidation of metals or alloys. Aluminum and its alloys form a layer of oxide film on aluminum products (anode) under the action of applied current under the corresponding electrolyte and specific process conditions. The aluminum, stainless steel, zinc, copper are also easily operated by anodizing.

Passivation is a common method to transform the metal surface into a state that is not easy to be oxidized in order to delay the corrosion rate of the metal. In addition, the chemical activity of an active metal or alloy is greatly reduced, and the phenomenon of becoming a precious metal is also called passivation.

Forlong Precision Machining, as a precision cnc parts manufacturer, adopts electric current to lower the dissolved metal cations, so that they become a thin bond metal coating on the electrode to alter the characteristics of the metal appearance or increase the thickness of parts. Forlong usually uses chrome plating, nickel plating, etc.

Surface finish drawing refers to spray the different colors or paint onto the metal or plastic machined parts, it will improve the appearance and corrosion-resistant.

This technology of surface finish engineering is  also known as blackening, or gun bluing, a chemical process of forming a black conversion coating on stainless steel, copper, and copper based alloys, zinc, powdered metals, silver solder, and ferrous materials, the black oxide coating can improve corrosion resistance and minimize light reflection.

It means that forms a black conversion coating on stainless steel, copper and copper-based alloys, zinc, powdered metals, silver solder, and iron materials. The corrosion resistance or light reflection will be improved a lot. 

Polished surface finish service refers to the way of grinding the surface of parts or using a chemical action to produce a smooth and shiny look, achieve the significant shinning appearance or lower diffuse effect in some materials.

Compared with the liquid coatings, powder coating is a kind of coating applied as a free-flowing dry powder, which is transmitted by evaporating solvents, powder coatings adopt electro-statically way commonly and then fixed by means of heat or ultraviolet light. The thermoplastic or thermosetting polymer can be selected as the powder. Commonly they are used to create hard finishes that are harder than conventional paints finish.

The process of heating or cooling at very high temperatures to bring the metal to a certain stage or change some features. Heat treatment include annealing, tempering, hardening, precipitation strengthening, tempering, carburizing, normalizing, and quenching

The gloss is applied between the matte material's matte, matte finish and the bright glossy finish of the glossy finish. The visual effect is related to ambient lighting. Satin metal has reflectivity, flatness, and gloss. Often the surface finish measurement is made after stain finish.

The method of pushing the abrasive flow made of high-speed sand particles to the metal surface through air-blast equipment and other blowing equipment under high pressure to remove surface contaminants, and clean the metal or increase the surface finish roughness, and then change the smoothness or appearance.

This is called chromate conversion too, which convert metals into a protective layer by means of chemical or electrochemical material, mainly as a corrosion inhibitor and a decorative layer or to maintain conductivity.