NACE International - National Association for Corrosion Engineers. 
NACE is involved in every industry and area of corrosion prevention and control, from chemical processing and water systems to transportation and infrastructure protection. NACE is recognized as the premier authority for corrosion control solutions. <a href="http://www.nace.org/">www.nace.org</a>

SSPC - The Society for Protective Coatings.
SSPC is the only non-profit association that is focused on the protection and preservation of concrete, steel and other industrial and marine structures and surfaces through the use of high-performance industrial coatings. SSPC is the leading source of information on surface preparation, coating selection, coating application, environmental regulations, and health and safety issues that affect the protective coatings industry.<a href="http://www.sspc.org/">www.sspc.org</a>