Research Article

Copper Corrosion Inhibition in 1 M HNO3 by Two Benzimidazole Derivatives

Table 1

Corrosion kinetic parameters for copper in 1 M HNO3 in absence and presence of the investigated inhibitors.

Concentration (M) 𝐸 𝑎 (kJ·mol−1) Δ 𝐻 𝑎 (kJ·mol−1) Δ 𝑆 𝑎 (J·mol−1·K−1) Δ 𝐺 𝑎 (kJ·mol−1)

Blank
 012.249.60−233.383.85
MBI
 5·10−56.493.85−251.583.82
 10−46.293.65−254.184.45
 5·10−46.143.49−263.787.36
 10−35.793.15−269.288.77
TMBI
 5·10−59.857.21−241.083.86
 10−49.486.84−244.884.70
 5·10−46.884.24−261.387.32
 10−34.922.27−273.689.28