Coating to protect against external influences, or to beautify the appearance of the surfaces of objects covering the operation of another substance. Kaplamacılıkta as a means of coating used in many procedures.
Metal coating: metal or non-metallic anti-corruption bodies, surfaces or abrasion-resistant metal covered many times. Cleaned and prepared before the coated surface. Coating process, spraying, dipping, diffusion, gas and vacuum is performed within the means of condensation.
Surrface Preparation: Before the coating process of organic and inorganic contaminants and oxide layers coated surfaces must be cleaned thoroughly. For this, the metal surface, immersed in the appropriate solvent or solvents to clean the surface by spraying the surface of foreign substances. Alkaline detergent is used according to the type of dirt or acid solutions. If necessary, they will contribute to the high pressure injection into the corrosive salts utilized fine. Electrolysis method may be applied. Oxide layer of steel and removal of 65-85 ° C temperature reduction as a matter of 15% 10-sulfate acid (H2SO4) solution or dilute hydrochloric acid at 20 ° C is used.

Mechanical cleaning: Aluminum oxide or silicon carbide abrasive stone and dust, sand paper or cloth surface to smooth and covered by dirt, foreign material removed. The surface is sprayed with steam under pressure, or abrasive powders or etching the surface of a rotating drum is provided in the covered parts.

Chemical cleaning: This method of acid etched metal surfaces, dağlanır, chemical or electrochemical polished way. Copper surfaces are usually persulphates, chromate compounds, or salts of iron oxide by using three dağlanır. Chemical polishing of zinc and aluminum, such as nitric and phosphoric acid is carried out by immersion into a strong oxidizing acid solutions. Electro-polishing of the aluminum, iron, steel, stainless steel, zinc, various alloys, electrolytic copper anode connects to the bathroom.

Metal Coating Operations

Injection: In case the corresponding metal or metal alloy powder or wire coated with a gun to the surface is sprayed is melted. Spray coating through the two most widely used metals, zinc and aluminum. More liquid metal spray tanks, used for coating of steel structures in place.

Hot-dip: coated metal surface, after cleaning the molten metal daldırlarak surface diffusion (diffusion) through the coating is provided. For this purpose, as metal coatings, zinc, tin, lead and aluminum is used. Steel, zinc is dipped galvanized. Zinc can also be used instead of tin. Thin sheets of iron from tin cans are immersed. To avoid surface oxidation during the process, the appropriate fluxes, using the surface air in contact with hydrogen or inert gases are cut off.

Cementation or diffusion coating: coated metal, put into powder coating the metal is heated to be used. Environment oxidation, anti-substances in contact with air, inert gases are kept. For example, with a metal coating of aluminum diffusion of the means by which metal parts kalorizasyon process, in which the aluminum powder is placed in a rotating drum. Sementasyonunda iron temperature is 850 ° -950 ° C. This way of iron with zinc kaplanmasına şerardizasyon (shererdization) is called. Chrome plating is done with it is called kromizasyon.

Pin (Percussion), coating (Peen plating): coated metal parts, metal powders used in coating solution and an activator in conjunction with a rotary drum is placed inside. There is also the effect of metal parts falling within the pulse of the drum. Washer (washer), nails, small pieces of chain with this method, such as zinc, brass and is coated with cadmium.

Gas coating: Coating of metal used for the gaseous compound, usually carbonyl, while the coated object is heated body. Hot on the surface of metal atoms separated from the gaseous compound is collected on the surface. This procedure than chromium and iron-plated nickel coating can be sometimes.

Vacuum condensation: this method of casting metals and plastics can be coated with metal. To be used for coating metal is evaporated in vacuum by heating with tungsten heater. Track surface is coated, cleaned, adjusted and polished the metal vapor within the cell are rotated. Metal vapor condenses on the surface of the cold part. Aluminum, gold, silver and other metals buharlaştırılabilen used for this purpose. This is not sort of wear-resistant coatings, also coated with a lacquer.

Chemical reduction through the coating (Electroless): Water-soluble silver, gold and copper salts in an aqueous medium with a strong reducing effect through the reduction of the glass (as in the construction of the mirror), plastics and metals can be covered.

Chemical coating by means of substitution: Fields, the displacement solution through the copper, gold, silver and coated with tin. Coating thickness is very thin (2.5 x10-6 mm).

Plated by electrolysis (Electroplating): coated metal or plastic track surface was made conductive, the metal salt solution used for coating in the cathode connected to the metal cations, coated on the surface by the accumulation is performed by passing an electric current. (See Electrolysis)

One of about 33 with the metal, in aqueous solutions, electrolysis can be plated. Other metals plated with molten salts or organic electrolytes to do is electrolysis. The coating of metal with about 15 commercial purposes. Some of these are: Copper, silver, zinc, gold, platinum, cadmium, tin, lead, chromium and nickel

Coating Titles