ETP protective coating" refers to a specialized coating applied to the interior of Effluent Treatment Plant (ETP) tanks and structures, designed to protect the concrete or metal surfaces from the corrosive effects of wastewater and chemicals present in the treatment process, ensuring the longevity and functionality of the ETP system; typically, these coatings are highly resistant to abrasion, chemicals, and temperature fluctuations, often made from materials like polymers, epoxy resins, or fiberglass reinforced plastic (FRP).

WTP protective coating" refers to a specialized coating applied to surfaces within a Water Treatment Plant (WTP) to protect the infrastructure from corrosion caused by the chemicals and water involved in the water treatment process, essentially safeguarding the plant's equipment and extending its lifespan; these coatings often need to be highly resistant to chemicals, abrasion, and moisture depending on the specific treatment stages within the WTP.