Amine-cured epoxy coating steel

Degradation of Amine-Cured Epoxy Coating on Cold-Rolled Steel... 

FTIR-RA spectra of the amine-cured epoxy coating on cold-rolled steel before and after exposure at 40°C and 80% RH are shown In... 

Fourier transform Infrared spectroscopy has been shown to be an excellent tool for surface and Interface studies (.2), In this paper, the application of reflection/absorption Fourier transform Infrared spectroscopy (FTIR-RA) for studying the degradation of amine-cured epoxy and polybutadiene coatings on cold-rolled steel after exposure to a warm, humid environment is reported. 

The best generic coatings for carbon steel that may be surrounded by wet insulation in the 140° to 250° F (60° to 120° C) range are the epoxy phenolic and the amine-cured coal tar epoxy formulations. 

Nuclear coatings are formulated to seal and protect concrete, concrete block and steel surfaces. The most commonly used coating types are the amine and polyamide cured epoxy systems. The solids, by volume, can vary from 50 to 100% with fillers or reinforcement fibers usually added so that the coating can perform a wide variety of functions. Reasons for their wide use are that they bond tenaciously to a variety of substrates they cure to a hard smooth finish which results in superior decontamination qualities and, most importantly, they perform satisfactorily in Ciass 1 and 2 service. 

Epoxy resins cured with aminoamide resins or amine adducts are often used for large metal constructions. Paints based on these resins are normally applied in four layers. Epoxy coatings form films that are resistant to organic solvents and a wide range of chemicals. Epoxy coatings are currently used for the majority of steel and aluminum constructions, but are also suitable for use on other construction materials (e.g., concrete). They can protect buildings in chemical plants and nuclear power... 

Epoxy Contain epoxide resin cures by chemical reaction two-part system (hardener and resin) excellent adhesion to most substrates, tough and durable films good resistance to solvents, water, chemicals, and abrasion poor resistance to sunlight (chaUdng breakdown process) which limits outdoor use to primers and intermediate coats most commonly used are polyamide- and amine-cured modified epoxies can be used in steel concrete, flooring and lining applications. 

The best performing coatings were the vinyl ester, the bisphenol A epoxy cured with an aliphatic amine, and a novolac epoxy cured with a mixed aromatic/cycl oal i phati c amine. The saturated polyester, and a bisphenol A epoxy cured with a polyamide amine showed significant deterioration of the coating material in the acid, and corrosion of the underlying steel. Two types of novolac epoxies cured with aromatic amines showed intermediate performance. 

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