Corrosion Inhibition Properties of TTA and Phosphate on Copper and Stainless Steel

Based on the corrosion issue of cooling water system containing copper, the corrosion inhibition properties and protection mechanism of inhibition on copper and stainless steel were studied by performing the electrochemical test, immersion test and dynamic water simulation test. The results show that corrosion inhibitors have excellent corrosion inhibition efficiency on copper in the condition of either pure water or harsh water. The optimum inhibitor is the compound consisting of TTA and sodium orthophosphate. At the same time, the corrosion inhibitor elevates the breakdown potential of stainless steel and contributes to the enhancement of corrosion resistance.