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Is the primer corrosive?
05 Sep 2025
Basic Properties and Uses of Primers:
A primer is a coating whose primary function is to enhance adhesion between the coating and the substrate, provide protection, and reduce surface tension. It helps repair surface defects, enhance smoothness, and prevent rust, corrosion, and oxidation.
Classification of Primers:
Primers can be divided into solvent-based and water-based primers based on their chemical properties. Solvent-based primers, primarily composed of organic solvents, offer advantages such as fast application, fast drying time, and strong adhesion. Water-based primers, primarily composed of water-dispersible resins, are environmentally friendly, safe, and low-odor.
Corrosiveness of Primers:
Primers may corrode metals if used improperly, such as excessive use or not following the instructions.
Specialized primers, such as pickling primers, primarily remove oxide layers and impurities such as grease from alloy surfaces. Improper use can lead to greater corrosion.
Generally speaking, under normal use, primers do not exhibit significant corrosive effects on metals and other materials. Instead, it is designed to protect the substrate from rust, corrosion, and oxidation.
Special Circumstances:
Conclusion:
Under normal use, primers are not corrosive and, in fact, provide protection against corrosion. However, improper use or the use of certain types of primers can cause corrosion to substrates such as metals.
Recommendation:
When using a primer, always follow the product instructions to ensure proper application to maximize its protective properties and avoid potential corrosion risks.
