Effect of Preparation Methods on Corrosion Inhibition Performance of Plant Extraction

Pressed juice and cooked soup prepared from white radish,caraway,green Chinese onion,grapefruit pericarp and ginger were used as corrosion inhibitors and the corrosion behavior of carbon steel in these ten inhibitors was studied using electrochemical methods.The results showed that all the preparations could slowdown the corrosion rate of steel in acidified NaCl solution,and the inhibition performance of pressed juice was obviously different from that of cooked soup of green Chinese onion and ginger.For green Chinese onion,the inhibition performance of pressed juice was better;but for ginger,the inhibition performance of cooked soup was better.The influence of extraction methods on the inhibition performance derived from the composition change of corrosion inhibitors.