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Can Cast Iron Be Powder Coated
On whether cast iron can be treated with powder coating
Taste the matter of metallurgy, cast iron is strong and rigid, and is often used for utensils. However, the rise of powder coating, everyone doubts, cast iron can be coated with this?
View the principle of powder coating, which uses electrostatic adsorption or thermal spraying to make the powder adhere to the surface of the utensil, which is baked and cured to form a tough film. This film can protect the utensil from corrosion and increase its appearance.
Although cast iron is solid, it has a high carbon content and a rough and porous surface. At first glance, it seems that it is not conducive to powder adhesion. In the cover hole, the gas is easy to exist. If the powder enters, when baking, the gas will expand and the film will crack, and the quality of the coating will be difficult to complete.
However, the matter is not absolute. If you want to apply powder coating to cast iron, you must first improve its pre-treatment. By mechanical grinding or chemical etching, remove the rust, flatten the concave and convex, and make the surface uniform. Then degreasing and degreasing can be used to eliminate the disturbance of oil stains, so that the powder can be easily adhered.
In addition, the choice of powder is also important. When choosing the one with good affinity with cast iron and the baking temperature, it should be precisely controlled. If the temperature is high, the cast iron is easy to deform, and if the temperature is low, the powder is difficult to solidify; if the quality of the cast iron is damaged for a long time, the coating will not be strong if it is short.
If the pretreatment is fine, the powder is suitable, and the temperature is appropriate, the cast iron can also be protected by the powder coating. Its durability and beauty are beneficial to the utensils. From this point of view, cast iron must be powder coated, and it can only be obtained if the operator understands the reason and the method.
Taste the matter of metallurgy, cast iron is strong and rigid, and is often used for utensils. However, the rise of powder coating, everyone doubts, cast iron can be coated with this?
View the principle of powder coating, which uses electrostatic adsorption or thermal spraying to make the powder adhere to the surface of the utensil, which is baked and cured to form a tough film. This film can protect the utensil from corrosion and increase its appearance.
Although cast iron is solid, it has a high carbon content and a rough and porous surface. At first glance, it seems that it is not conducive to powder adhesion. In the cover hole, the gas is easy to exist. If the powder enters, when baking, the gas will expand and the film will crack, and the quality of the coating will be difficult to complete.
However, the matter is not absolute. If you want to apply powder coating to cast iron, you must first improve its pre-treatment. By mechanical grinding or chemical etching, remove the rust, flatten the concave and convex, and make the surface uniform. Then degreasing and degreasing can be used to eliminate the disturbance of oil stains, so that the powder can be easily adhered.
In addition, the choice of powder is also important. When choosing the one with good affinity with cast iron and the baking temperature, it should be precisely controlled. If the temperature is high, the cast iron is easy to deform, and if the temperature is low, the powder is difficult to solidify; if the quality of the cast iron is damaged for a long time, the coating will not be strong if it is short.
If the pretreatment is fine, the powder is suitable, and the temperature is appropriate, the cast iron can also be protected by the powder coating. Its durability and beauty are beneficial to the utensils. From this point of view, cast iron must be powder coated, and it can only be obtained if the operator understands the reason and the method.
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