Research Article

Corrosion Inhibition Effect of Carbon Steel in Sea Water by L-Arginine-Zn2+ System

Table 7

AFM data for carbon steel surface immersed in inhibited and uninhibited environments.

SampleRMS (Rq) roughness (nm)Average (Ra) roughness (nm)Maximum peak-to-valley height (nm)

(1) Polished carbon steel4.333.4135.28
(2) Carbon steel immersed in sea water (blank)40.231.0191.1
(3) Carbon steel immersed in sea water + 250 ppm of L-Arg + 25 ppm Zn2+34.425.686.02