Research Article

Copper Corrosion Inhibition in 1 M HNO3 by Two Benzimidazole Derivatives

Table 3

Gibbs plots parameters for copper corrosion in 1 M HNO3 for different concentrations.

Inhibitor 𝐶 ( M ) Δ 𝐻 0 a d s (kJ·mol−1) Δ 𝑆 0 a d s (J·mol−1·K−1) 𝑅 2

MBI
 5·10−515.93159.20.999
 10−412.47147.60.996
 5·10−49.26138.30.996
 10−37.82133.30.997

TMBI
 5·10−513.70152.60.994
 10−412.05147.40.992
 5·10−411.53145.50.991
 10−38.72137.80.995