Research Article

Black Wattle Tannin As Steel Corrosion Inhibitor

Figure 1

Influence of tannin concentration in the polarization resistance ( 𝑅 𝑝 ) for carbon steel samples immersed 1 day in aerated 0.1 mol L−1 Na2SO4 solutions: (□) pH 2.5 medium and (●) pH 6 medium.
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