Metal surface treatment is the process of applying a protective or decorative film to metal surfaces. The article discusses and compares the different types of surface treatments available, including nitriding, anodizing, galvanizing and plating.

The Fundamental of Metal Surface Treatment

The fundamental of metal surface treatment is the process of changing the surface of a metal object to improve its appearance or durability. The most common methods of metal surface treatment are painting, plating, and anodizing.

Processes of Metal Surface Pretreatment

The process of metal surface treatment can be divided into two main types: pretreatment and finishing. Pretreatment is any process that prepares the surface of the metal for the next step in the surface treatment process. Finishing is any process that creates a desired finish on the metal surface.

Pretreatment processes include cleaning, etching, and passivating. Cleaning removes contaminants from the surface of the metal so that they will not interfere with the surface treatment process. Etching removes unwanted material from the surface of the metal so that the desired finish can be achieved. Passivating protects the metal from corrosion and other damage during the finishing process.

Finishing processes include plating, anodizing, and painting. Plating adds a layer of material to the surface of the metal to improve its appearance or function. Anodizing creates a protective oxide layer on the surface of the metal to prevent it from corroding. Painting adds a layer of paint to protect the metal from corrosion and provide a desired color or finish.

Advantages and Disadvantages

There are many advantages and disadvantages to metal surface treatment. The main advantages are that it can improve the appearance of the metal, make it more durable, and protect it from corrosion. The main disadvantages are that it can be expensive, time-consuming, and difficult to reverse.

Main Raw Materials

The main raw materials for metal surface treatment are metals and alloys. The most common metal surface treatments are electroplating, anodizing, and heat treating.

Applications of Metal Surface Pretreatment

The main purpose of metal surface pretreatment is to improve the adhesion and durability of coatings on metal substrates. Pretreatment also enhances the corrosion resistance of the substrate and can improve the aesthetic appearance of the coating.

There are many different types of metal surface pretreatment, each with its own advantages and disadvantages. The most common pretreatment methods are chemical cleaning, blasting, and flame cleaning.

Chemical cleaning is typically used to remove oils, greases, and other contaminants from the surface of the metal. This pretreatment method can be performed using a variety of chemicals, including solvents, acids, and alkalis.

Blasting is a popular pretreatment method because it provides a high degree of cleanliness and uniformity. In addition, blasting can be used to roughen the surface of the metal to promote better adhesion between the coating and substrate. Flame cleaning is another common pretreatment method that uses heat to remove contaminants from the metal surface.