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What is Pretreatment?

What is Pretreatment?

Pretreatment is the term applied to the process of preparing a metal surface for painting, powder coating or electroplating. This surface preparation process generally involves three, basic treatments:

1. Degreasing the metal surface to remove contaminants,

2. Derusting to remove corrosion products, usually using acids.

3. Applying a conversion coating e.g. phosphating to protect the metal surface.

After each of the above treatments, thorough rinsing of the metal surfaces is required to prevent carry-over and cross-contamination.  Thus, in practice, effective pretreatment can involve multiple process stages with automated workload handling.