Among hexadecylamines-inhibitors (or octadecyla mines) effective ones could be found when they were made by reacting 1mol. of amines with 2 or 3 mols. of acids. We have tested various corrosion inhibitors. both in sea water and in acidic solution, which consist of n-hexadecylamines and various fatty acids. When those were C
8-C
12 straight chain acids or unsaturated C
18 ones, best inhibition could be expected.
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