Answers | Verified | Latest Update 2026/2027
A barrier coating interrupts the ______ of the electrochemical cell. - ANSWER -
Electrolyte
Steel temp must be _ degrees less than the dew point to coat - ANSWER -5
Co-Reaction - ANSWER -* Cure by polymerization reactions between at least
two chemical entities
* Polymerization is also referred to as 'cross linking"
* Eamples include: Epoxies, Polyurethanes, Polyureas, Polyaspartics,
Polysiloxanes and several others
Fusion Bond Epoxy (FBE) is most commonly used to coat ____ - ANSWER -
Pipe
Coatings that require external moisture to cure - ANSWER -Single component
polyurethane, solvent borne inorganic zinc
Amine blush is likely to occur with which type of coating? - ANSWER -Epoxy
Type of coating that cures fastest - ANSWER -Polyurea
Mud cracking of an inorganic zinc-rich (IOZ) primer can be caused by -
ANSWER -Applying it too heavily
Primers commonly used for structural steel - ANSWER -Epoxy, Inorganic zinc,
Organic Zinc
Coatings that cure by polymerization are? - ANSWER -convertible
Water borne latex coatings cure by a process known as? - ANSWER -
Coalescence
UV light on a blasted surface can show - ANSWER -Oil
Danger with sprayed polyurethane coating - ANSWER -Isocyanates
, ISO 8503 - ANSWER -surface roughness
ISO SA 2-1/2 is similar to NACE _ and SP _ - ANSWER -2, 10
Alkyd coatings when applied to a highly alkaline surface will fail prematurely due
to - ANSWER -Saponification
SSPC Vis 1 rust with mill scale and rust... what grade? - ANSWER -Grade B
ASTM D 4417 Method B. How many measurements at each location? -
ANSWER -10, record max values
High humidity when applying coatings means - ANSWER -Slow solvent
evaporation
Which is faster - airless or conventional air spray? - ANSWER -Airless
Improper atomization may cause - ANSWER -Uneven DFT, dry spray, overspray
what to do to coating if high viscosity - ANSWER -Add thinner, heat the coating
SSPC No. 12. How many candles/lumens? - ANSWER -50 foot candles or 538
lumens
Minimum distance from edge with magnetic pull-off DFT gage? - ANSWER -1
inch
Testing procedure for water soluble ferrous salts - ANSWER -Potassium
ferricyanide test
Chalking happens from what type of coating - ANSWER -Epoxy
Small bowl-shaped depressions in the coating film - ANSWER -cratering
Blister = - ANSWER -Surface contamination
NACE SP0188 wand moves maximum speed of - ANSWER -1 linear ft/sec