What are the most relevant industry definitions related to corrosion protection by surface treatment used in the production of wind turbine towers?

Below is a list of some of the most significant definitions for surface treatment of wind turbine towers (these are definitions taken from ISO 12944-1 to ISO 12944-9 unless otherwise specified).

Thermal sprayed metallic coat:
Thermal-sprayed metallic coatings are produced by heating the coating metal to its molten stage and projecting it in a stream of gas onto the prepared surface to be coated.

Priming coat:
The first coat of a coating system. Priming coats provide good adhesion to sufficiently roughened and cleaned metal, ensuring a sound base for, and offering adhesion to, the subsequent coats. Primers normally also provide corrosion protection during the whole surface life of the paint system.

Topcoat:
The final coat of a coating system.

Sealer coat (also called a mist coat):
This is a coating material applied to porous surface prior to painting to reduce the absorptivity to avoid pinholes.

Durability:
The expected life of a protective paint system to the first major maintenance painting. Durability is a technical consideration/planning parameter that can help the owner set up a maintenance programme. This should not be understood as a warranty.

Metallisation:
A cathodic corrosion protection of the steel surface.

Paint:
A pigmented coating material which, when applied to a substrate, forms an opaque dried film having protective, decorative or specific technical properties [ISO 4618].

Protective coating/paint system:
The sum total of the coats of metal materials and/or paints or related products which are to be applied or which have been applied to a substrate to provide corrosion protection

Significant surface:
The part of the structure covered or to be covered by the coating system and for which the coating is essential for serviceability and/or appearance and where the coating shall meet all of the specified requirements.

Local thickness:
The mean of the thickness measurements, of which a specified number is made within a reference area.

Minimum local thickness:
The lowest value of the local thicknesses found on the significant surface of a single structure.

Maximum local thickness:
The highest value of the local thicknesses found on the significant surface of a single structure.

Average thickness:
Either the value obtained by analytical methods or the mean of a specified number of local thickness measurements that are evenly distributed over the significant surface.

Reference: https://megavind.greenpowerdenmark.dk/publications/wind-turbine-generators-surface-treatment-of-wind-turbine-towers-industry-standard