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.
| Sample | RMS (Rq) roughness (nm) | Average (Ra) roughness (nm) | Maximum peak-to-valley height (nm) |
| (1) Polished carbon steel | 4.33 | 3.41 | 35.28 | (2) Carbon steel immersed in sea water (blank) | 40.2 | 31.0 | 191.1 | (3) Carbon steel immersed in sea water + 250 ppm of L-Arg + 25 ppm Zn2+ | 34.4 | 25.6 | 86.02 |
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