Abstract: A process which comprises contacting the surface of a metal with an alkyl or acyl substituted catechol.The contacting may be effected using the substituted catechol alone or in a suitable medium for example as a solution or emulsion. The contacting is effective in providing corrosion inhibition even with lightly rusted iron surfaces.

Abstract: Fluoromethylpyridines of the formula: ##STR1## wherein the group F.sub.n H.sub.3-n C-- may be ortho, meta or para to the ring nitrogen atom, n is 1, 2 or 3, m is 1 to 4, X is Cl, Br, I or F and, when m is 2, 3 or 4 the substituents represented by X may be the same or different, at least one X being ortho or para to the F.sub.n H.sub.3-n C-- group, are prepared by reacting a compound of the formula: ##STR2## wherein Y is Cl, Br, I or F and m is 1 to 4, with potassium fluoride in a polar aprotic solvent under substantially anhydrous conditions. These fluoromethylpyridines are useful as intermediates for herbicides. 3,4,5-trifluoro-2-trifluoromethylpyridine and 2,6-difluoro-3-difluoromethylpyridine are novel compunds.

Abstract: Corrosion inhibition of metals (especially iron, zinc, copper, tin and aluminium and in particular mild steel and the zinc surface of galvanized steel) is provided by treatment with an optionally substituted 2-hydroxy-5-alkylbenzaldoxime wherein the 5-alkyl group contains from 7 to 13 carbon atoms. The benzaldoxime may be applied directly or as a solution in an organic solvent or as an aqueous emulsion. The benzaldoxime may be formulated in a surface coating composition.