Anodizing is the process through which the metals layer becomes thick. A layer of oxide is formed on the upper layer, which makes the metal thicker and finer. Anodizing avoid corrosion on metals and keeps the paint very fine. Anodizing is first used in 1923 in order to prevent the corrosion on the duralumin. This first process of anodizing is known as Bengough-stuart process. Aluminum is the weak chemical element whose 8% is present to form the earth crust by weight. Aluminum anodizing is a process in which a thick layer of oxides is formed on the aluminum thus making the aluminum rod thicker. This also hardens with the aluminum and makes the surface rough. It gives light silvery bright shade on the aluminum.

Aluminum Anodizing Procedure

Actually, it is a simple process. Aluminum anodizing equipment, which is commonly name as electrolytic cell, is used for anodizing purpose. In this cell, the electricity is passed in order to electrolyte the water that is placed in the cell. The hydrogen is then passed to the cathode as cathode hold negative sign where as the oxygen passed to anode which is made up of aluminum holding positive charge. As a result an oxide layer is formed on the aluminum.

Aluminum is anodized in order to prevent it from corrosion. Anodizing increases the hardness of the aluminum surface, and this allows dyeing. Anodizing improves lubrication and adhesion of the aluminum. Anodizing aluminum produces amorphous oxide layer, which protect it further. This layer is 2 to 3 nm thick in other metals but in the case of aluminum, 5-to 15 nm thick layer is formed. Have you ever seen the commonly use things like camera, mp3 players, windows frames, sporting goods, flashlights and cookware. These all are made of aluminum and always corrosion resist. All these things are if made up of aluminum then these hold thick layer of aluminum around them and are very fine and hard. They have ability to retain dye. The products of aluminum having large pores are less resistance than those having fine smooth surface.

This is due to the worst extrusion process of aluminum, which keeps low extrusion and thus formed a layer, which holds deep pores in it. BMW cars are more demanded than other cars and this is due to the reason that their car body is anodized properly which prevents it from corrosion. Physical properties of aluminum anodizing hold low thermal conductivity and coefficient of linear expansion. If anodized aluminum products are exposed to the temperature above 80 degree Celsius then they are cracked but they cannot be peeled. The melting point of anodized aluminum is 2050 degree Celsius, which is much greater, than the melting point of the pure aluminum. Due to this reason, the anodized aluminum, become tougher because of welding. As the thickness increases with extra anodizing, greater will be the resistance of aluminum to corrosion.

Aluminum Anodizing At Home

Before anodizing the aluminum, it is soaked in a hot cleaner or it goes through the bath from solvent solution. Then this aluminum is etched in mix of acids. This mixture of acids includes different acids such as sodium hydroxide, sodium gluconate or ammonium bifluoride. This aluminum then becomes much brightened. Aluminum anodizing kit for the home use can easily be bought from the market or from any shop selling laboratory equipments. Forming aluminum anodizing is very rarely formed rather this process is very common in chemical laboratories.

Aluminum Anodizing Specifications

The process of aluminum anodizing is specific only for industrial use or for the use of aluminum in Construction Company. In other organizations, anodized aluminum is less in use. The process only needs 300-voltage direct current. Higher voltage is required in order to make a thicker coat. Other specifications involve specific condition for electrolyte concentration, temperature, current and acidity. Aluminum anodizing is specified only to the laboratory use or for its use in making different frames.