Polysulfones(PSU) are used in specific applications. One of the important applications of these polymers is the protection of steel structures against corrosion. In this study we were synthesized polysulfone at different solvent conditions and stoichiometric ratios. These conditions changed molecular weight and reaction efficacy and then we evaluated their anti-crossion effect. The present work reports a method of preparing semi-interpenetrating polymer network (semi-IPN) through insitu polymerization of polysulfone within epoxyresin-hardener. Polysulfone was blended with epoxyresin-hardener and then was coated on sheets of plain carbon steel (ST-13) at specified time intervals. Observations demonstrated that crossion effect was improved 8 times compared to the control samples by using a trace amounts of polysulfone (0.5%). Also we found that increase in amount of polysulfone lead to improve anti-crossion property significantly.

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