International Journal of Corrosion

Research Article

Study of Temperature Effect on the Corrosion Inhibition of C38 Carbon Steel Using Amino-tris(Methylenephosphonic) Acid in Hydrochloric Acid Solution

Table 1

Electrochemical parameters and the corresponding inhibition efficiencies at various temperatures studied of C38 steel in 1 M HCl containing different concentrations of ATMP.
Temperature (C°)Conc. (M) versus SCE mV ( ) (mV )E (%)θ
301 M HCl−482569.8188——
5 × 10−5−482477.818616.10.16
5 × 10−3−473175.414669.20.69
5 × 10−2−471109.312880.80.81
1 × 10−1−46476.712286.50.87
401 M HCl−464800.7190——
5 × 10−5−470700.318912.50.13
5 × 10−3−452478.715440.20.40
5 × 10−2−471308.313261.50.61
1 × 10−1−462235.312970.60.71
501 M HCl−461999.1191——
5 × 10−5−455875.918812.30.12
5 × 10−3−463737.216626.20.26
5 × 10−2−464572.714542.70.43
1 × 10−1−454407.913459.20.59
601 M HCl−4651314.7194——
5 × 10−5−4561195.51919.00.09
5 × 10−3−4611046.918720.40.20
5 × 10−2−453788.016740.10.40
1 × 10−1−445651.115250.50.50