Corrosion inhibitor compositions and methods for inhibiting corrosion on a metal surface exposed to a hydrocarbon fluid are provided. The corrosion inhibitor composition can comprise 2-aminoterephthalic acid, dimethyl sulfoxide and heavy aromatic naphtha (HAN). In another embodiment, the composition can comprise 4-methylamino benzoic acid or 4-methylsulfonyl benzoic acid, N-methyl pyrrolidone, and HAN. In the method, a corrosion inhibitor composition comprising 2-aminoterephthalic acid, 4-methylamino benzoic acid, or 4-methylsulfonyl benzoic acid can be added to a hydrocarbon fluid exposed to the metal surface. The corrosion can be caused by naphthenic acid.