Average equivalent annual cost (AEAC)
The entire stream of present and future costs converted to a net present value and distributed in equal amounts over the project's/structure's service life.

Cleaning grade
Extent to which the steel surface is prepared prior to the coating application; generally identified according to SSPC grades.

Dry film thickness (DFT)
The coating thickness after complete drying.

Full repainting
Total coating removal and replacement performed at the end of the time interval that includes the maintenance repaint time + 50%.

Hot-dip galvanizing
Process of applying a zinc coating to fabricated iron or steel material by immersing the material in a bath consisting primarily of molten zinc. The zinc coating provides both barrier and cathodic corrosion protection.

Life-cycle cost
The sum of initial corrosion protection system costs and all maintenance costs incurred during the service life of the project. Life-cycle cost may be expressed in net present value (NPV) or average equivalent annual cost (AEAC).

Maintenance painting
Spot prime and full coat painting performed at the end of time interval that includes the practical service life time + 33%.

Net future value (NFV)
The current cost with inflation included, i.e. how much maintenance will cost, in inflated dollars in the year scheduled.

Net present value (NPV)
The present worth of the inflated cost (NFV) in monies today invested at current interest rates.

Touch-up painting
pot repair performed on the structure at the point in time designated as the practical service life.