Anodizing but corroding the cathode

Anodized aluminum alloy and electroplated aluminum alloy are the same in form, but different in essence.

Form: The surface effect is similar

In essence: anodizing is the fusion of metal ions on the surface of aluminum alloy, not easy to fall off; Processing environmental protection belongs to the third level.

Electroplating is a variety of metals attached to the surface, easy to fall off. Processing environmental protection belongs to the first level.

Electroplating concept: is the use of the principle of electrolysis on some metal surface on a thin layer of other metal or alloy process.

Electroplating, plating metal as an anode, is oxidized into cations into the plating solution; To be plated metal products as the cathode, coating metal cations on the metal surface is reduced to form a coating. In order to eliminate the interference of other cations, and make the coating uniform and firm, it is necessary to use a solution containing metal cations electroplating solution, in order to keep the concentration of metal cations in the coating unchanged.

The purpose of electroplating is to coat the substrate with a metal coating to change the surface properties or dimensions of the substrate. Electroplating can enhance the corrosion resistance of the metal (coated metal is mostly corrosion-resistant metal), increase hardness, prevent wear, improve electrical conductivity, lubrication, heat resistance, and surface beauty.

Anodized alumina refers to a layer of dense alumina plated on the surface of aluminum or aluminum alloy. Its chemical properties are the same as alumina itself, which can prevent further oxidation of aluminum products or aluminum alloy objects. However, unlike ordinary oxide films, anodized aluminum itself can be electrolytically colored to stain objects, which is why people see anodized aluminum products on the market in silver, black and other colors.

Many metals are weakened by oxidation, but aluminum is not. In fact, aluminum can be made more durable through a process called anodizing. Anodizing involves putting a piece of aluminum into a pool of chemical acid, usually acetone, used in laboratories. The aluminum sheet becomes the anode of the chemical cell, and the acid pool becomes the negative electrode. An electric current passes through the acid, causing the surface of the aluminum to oxidize. The oxidized Aluminum forms a solid layer, and the result is an extremely strong substance called Anodized Aluminum.

With the right anodizing process, anodized aluminum can be almost as hard as a diamond. Some modern buildings use anodized aluminum as a metal frame that needs to be exposed. In addition, it is often used as a high-end cookware material, such as deep fryers. Heat is able to pass evenly through the anodized aluminum, and the plating process also provides natural protection. Other plating processes can be used to make anodized aluminum look like copper or other metals.

Anodizing but corroding the cathode