Protective film of thickness usually about 0.2-0.5mm, applied on steel surfaces to protect them from corrosion.
- Antifouling coating – A coating aimed at preventing damage to the exposed surface by the adherence and corrosive action of living microorganisms.
- Anticorrosive coating – A coating with the primary purpose to prevent the corrosion of an exposed surface.
- Hard coating – A coating, which chemically converts during its curing process, normally used for new construction, or non-convertible air-drying coating which may be used for maintenance purposes. Hard coating can be either organic or inorganic and covers typical marine coatings such as those based on epoxy, coal tar epoxy, polyurethane, chlorinated rubber, vinyl, zinc epoxy, zinc silicate.