Abstract
Corrosion is a problem not only for corrosion engineers and industry but for everyone, causing great expense and placing financial burden on the general economy. One of the ways of fighting this problem is through the use of proper coatings. This paper describes the properties of a primer formulation with a moisture curing urethane resin and pigmented with aluminum. This primer is a relatively new system and offers some unique properties as compared to some of our more standard primers used in industry today. Among these properties is the ability to go over a less than perfectly prepared surface and still perform unusually well. It has excellent wetability, penetration, and adhesion to substrate. It also offers excellent weathering and chemical resistance properties. Although the primer system was developed for use with urethane finish coats, it is compatible with a variety of other generic systems. It can be applied at temperatures from -7° C. (20° F.) to 60° C. (140° F.) and can be used as a finish coat as well as a prime coat.
Corrosion of steel surfaces is one of the biggest problems facing industry today. The cost on an annual basis is mind-boggling. It has been said that 40 million tons of steel corrodes each year causing a loss of over 70 billion dollars. Fortunately, there are ways of controlling this loss. One way is through proper selection and use of coating systems.
A coating system usually consists of a primer, an intermediate coat, and a finish coat, or a primer and a high build finish coat. The selection of the primer is very important, if not the most important part of the coating system.
