Steel use environment and corrosion conditions

Definition

Performance Requirements

Coating Effect

Harsh conditions

Products used in seawater or marine environments, as well as products that are used in chemical areas and other highly polluting industrial areas or that are exposed to chemicals for extended periods of time. Coatings used in this very harsh environment are called heavy-duty coatings, such as marine coatings,chemical anti-corrosion, etc.

Requires coatings to have excellent corrosion resistance

Usually the primer pays attention to rust prevention ,the middle coating and the top

coating focus on the shielding effect, and the entire coating system layer and layer complement each other to strengthen the shielding and anti-corrosion effect of the whole system.

Medium conditions

Areas with more annual rainfall, high air humidity, and closer to industrial pollution areas and coasts (within 3km)

The coating film is required to be in contact with water or an aqueous solution for a long time, and the environment in which the coating is used is harsh.

Any of three kinds of anti-corrosion effects of physical shielding, corrosion inhibition and electrochemistry can be employed. Corrosion inhibition is usually used as an anti-corrosion method under moderately harsh conditions, such as automotive coatings.

Mild condition

Often exposed to water, indoor use environments that require rinsing, such as kitchens, bathrooms, and indoors with a certain source of pollution. Coatings for washing machines and refrigerators are coatings for steel under mild conditions

Good water immersion resistance, wet adhesion, scratch resistance, impact resistance, etc., which can impair the protective properties of the coating film

Relying on physical shielding methods to prevent rust can meet the requirements and compare

Emergency mild condition

Used in dry and warm indoors without any polluted environment, such as paints used in general household appliances and toys

High decorative, gloss retention, abrasion resistance, scratch resistance, in some cases the decorative requirements of the coating are more important than the chemical resistance, the damage to the appearance of the coating film can not be accepted

Relying on physical shielding methods to prevent rust can meet the requirements and compare