I am working with a polysaccharide grafted on chitosan and my corrosive medium is 3.5 wt% NaCl. My surface is carbon steel. I am struggling to obtain a proper trend for my corrosion results. I am conducting OCP, EIS, and Tafel measurements but I get different results everytime I repeat my experiments for a certain concentration so finding a trend is difficult. How can I resolve this?

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