Authors: M Mobin A U Malik F AlMuaili M AlHajri
Publish Date: 2011/08/27
Volume: 21, Issue: 7, Pages: 1292-1299
Abstract
A material evaluation study has been carried out to determine corrosion behavior of a commercial polyurethane coating system Souplethane 5 in the marine environment The coating system is solvent free twocomponent polyurethane protective coating The performance of the coating on steel and rebar concrete was evaluated by conducting different types of tests which include atmospheric exposure immersion in 5 sodium chloride solution exposure to splash zone in seawater salt fog sabkha soil burial and electrochemical tests which include potentiodynamic polarization and AC impedance measurements Uncoated coated and coated scribed specimens were used in each study In general the coating showed good corrosion resistance in marine environment However the coated samples when subjected to break under applied compressive load showed partial or complete detachment from the substrate eg steel and rebar concrete This appears to be the major drawback of the coating while applying on steel and concrete structures
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