Compounds and methods for inhibiting corrosion in hydrocarbon processing units

A method for neutralizing acidic species and reducing deposits of hydrochloride and amine salts in a hydrocarbon refining process comprising:

• (a) contacting a fluid hydrocarbon stream present in said refining process with a first treatment composition after said fluid hydrocarbon stream leaves a desalter of said hydrocarbon refining process, said first treatment composition comprising at least one oil-soluble amine with a salt precipitation potential index of equal to or less than about 1.0;
• and
• (b) adding a second treatment composition to said fluid hydrocarbon stream after said fluid hydrocarbon stream leaves a distillation tower of said hydrocarbon refining process, said second treatment composition comprising at least one water-soluble amine with a salt precipitation potential index of equal to or less than about 1.0;
• wherein said at least one water-soluble amine is a member selected from the group consisting of 1,2 dimethylpropylamine, 1,4-dimethylpiperazine, N-methylpyrrolidine, di-ethylhydroxylamine, dimethyl-N-propylamine, N,N,N′,N′-tetramethylethylenediamine (TMED), 2-dimethylamino 2-methyl 1-propanol (DMAMP), N-methyl piperidine, N, N, N′, N′-tetramethyldiaminomethane (TMMD), dimethyl tertiary butanolamine (DMTBA), dimethyl methoxypropylamine (DMMOPA), furfurylamine, and combinations thereof.