Abstract: The apparatus for applying film coatings onto substrates in vacuum comprises a vacuum working chamber with a holder of substrates and magnetron material sputtering units, an evacuation chamber equipped with magnetron pump and communicating with a gas source, a pre-evacuation pump, an auxiliary evacuation chamber with a magnetron pump, an auxiliary gas source and a system of conduits. The system includes a conduit equipped with a control valve, communicating the auxiliary gas source with the auxiliary evacuation chamber, and two conduits each with its control valve, communicating the respective gas sources with the working chamber.

Abstract: An antifoaming inhibitor of hydrogen sulphide corrosion which is a compound of the general formula: ##STR1## where R is a divalent normal or branched alkyl containing from 1 to 6 carbon atoms,n=1 or 2;when n=1R' and R" are hydrogen or branched alkyl containing from 1 to 20 carbon atoms, normal or branched alkenyl containing from 3 to 14 carbon atoms, oxyalkyl containing from 1 to 20 carbon atoms, cycloalkyl containing from 5 to 6 carbon atoms,R' and R" are --(CH.sub.2).sub.m --,where m=2-10, --(CH.sub.2).sub.2 --NH--(CH.sub.2).sub.2 --; --(CH.sub.2).sub.2 --O--(CH.sub.2).sub.2 --;when n=2R' is hydrogen, normal or branched alkyl containing from 1 to 20 carbon atoms, normal or branched alkenyl containing from 3 to 14 carbon atoms,R' is --(CH.sub.2).sub.k, where k=2-10, --(CH.sub.2).sub.2 --NH--(CH.sub.2).sub.2 --.The proposed inhibitor is effective in acid, weak acid, and alkaline media in a wide range of hydrogen sulphide content.