Extended Operational and Trade Vocabulary
Marine Paints, Coatings and Antifouling glossary (page 3)
The coatings vocabulary: abrasive blasting and surface preparation, two-pack epoxy and polyurethane chemistry (activators, accelerators, acrylic binders), antifouling systems, and the cure, adhesion, and application-condition terms. Grounds each term in the coating chemistry or the surface-preparation process it belongs to.
554 defined terms.
Showing 54 on this page (page 3 of 3).
T
- Theoretical spreading rate
- Area covered by a unit volume of paint at the specified DFT, ignoring losses.
- Thickness gauge
- Magnetic or eddy current gauge used to measure dry film thickness.
- Thinner
- Solvent supplied by the coating manufacturer for use only at recommended dilution.
- Three-coat system
- Common marine coating system of primer, intermediate, and topcoat.
- Tie coat
- Coating layer specifically formulated to promote adhesion between dissimilar generic types, such as between epoxy primer and silicone fouling-release.
- Tin-free
- Antifouling free of tributyltin and other organotin biocides.
- Tinplating
- Surface treatment unrelated to marine paints but occasionally encountered in cargo tank construction.
- Topcoat
- Final coat of an atmospheric exposure system, providing color, gloss, and weather resistance.
- Touch-up
- Local repair coating applied to damage or holidays before service.
- TPL
- Theoretical paint loss, used in shipyard estimation.
- Tralopyril
- Antifouling booster biocide marketed as Econea by Janssen PMP.
- Tributyltin
- Organotin biocide formerly used in antifouling paints, banned under the AFS Convention.
- Triphenylborane pyridine
- Antifouling biocide used in some Japanese formulations.
- Tropicalized coating
- Coating system formulated for application and service in high-humidity tropical environments.
- Two-pack coating
- Coating supplied in two components mixed before use, such as epoxy and polyurethane.
U
- UHB
- Ultra-High Build coating capable of application at very high film thickness in a single pass.
- UHP water jetting
- Ultra-high-pressure water jetting at above 1700 bar, used for paint removal and surface preparation without abrasive.
- Ultrasonic thickness gauge
- Instrument used to measure coating thickness on non-ferrous substrates and steel plate thickness in ship surveys.
- Underwater coating
- Marine coating system applied to the immersed portion of the hull.
- Universal primer
- Surface-tolerant epoxy primer applied across a range of substrate conditions.
- Useful life
- PSPC target of 15 years during which coating system is intended to remain in GOOD condition.
V
- Vacuum blasting
- Closed-loop blasting and recovery system used for environmental compliance and small areas.
- Vapor degreasing
- Solvent cleaning using vapor of chlorinated or hydrocarbon solvent.
- Vehicle
- Liquid portion of a coating, comprising binder and solvent.
- Vinyl ester
- Resin chemistry used in chemical-resistant tank linings.
- Vinyl tar antifouling
- Older antifouling chemistry largely replaced by SPC and CDP systems.
- Viscosity cup
- Flow cup used in the field to verify thinned coating viscosity.
- VOC
- Dutch East India Company, chartered 1602.
- Volume solids
- Percentage of a wet coating that becomes dry film, used in spreading-rate calculation.
W
- Water-based coating
- Coating using water as principal solvent, limited use in heavy-duty marine work.
- Waterborne epoxy
- Two-pack epoxy thinned with water, used in accommodation and certain ballast tank applications.
- Waterline area
- Hull region around the load and ballast waterlines requiring special antifouling and abrasion resistance.
- Weathering steel
- Corten-type steel sometimes used in superstructure components; not generally a hull material.
- Web frame
- Internal stiffening member whose edges are stripe-coated during tank preparation.
- Weld bead
- Raised seam of weld metal whose edges must be ground smooth before coating.
- Weld preparation
- Grinding of weld profile and removal of spatter to enable adequate coating coverage.
- Wet abrasive blasting
- Surface preparation using water and abrasive to reduce dust and embedded particles.
- Wet film thickness
- Thickness of a freshly applied coat measured with a comb gauge before solvent evaporation.
- Wet-on-wet application
- Application of successive coats within the minimum overcoat interval.
- White metal blast
- Sa 3 / SSPC-SP 5 preparation grade, the highest standard of blast cleaning.
- Wrinkling
- Surface defect of finely furrowed coating film caused by uneven drying or excessive thickness.
X
- Xylene
- Aromatic chemical cargo; IBC Category Y.
Y
- Yacht enamel
- High-gloss alkyd or polyurethane finish marketed for yacht topsides.
- Yard primer
- Shop-applied weldable primer maintaining cleanliness of plate during fabrication.
- Yellowing
- Discoloration of light-colored topcoats due to UV or chemical exposure, particularly of aromatic isocyanate systems.
Z
- Z-shore hardness
- Loose term for shore-D hardness measurements of cured coatings.
- Zinc Anode
- Sacrificial anode for cathodic protection.
- Zinc chromate primer
- Historic anticorrosive primer largely phased out due to chromate toxicity.
- Zinc ethyl silicate
- Inorganic zinc-rich primer providing galvanic protection of steel at coating defects.
- Zinc phosphate primer
- Anticorrosive primer using zinc phosphate as the active pigment.
- Zinc pyrithione
- Booster biocide used in antifouling paints in combination with copper.
- Zinc silicate
- Inorganic zinc-rich primer based on ethyl silicate or alkali silicate binder.
- Zinc-epoxy primer
- Two-pack epoxy primer pigmented with zinc dust providing cathodic protection at coating defects.
- Zinc-rich primer
- Anti-corrosion primer for steel.