(WO9310283-A1)      Protecting (non-)galvanised metal against corrosion comprises plasma pretreatment of the metal with a gas comprising H2 and/or Ar, plasma deposition of a thin polymeric film and cathodic electrodeposition of an organic primer coating. Plasma deposition involves polymerisation of an organic cpd. as a film using DC power in a vacuum chamber enclosing a cathode and an anode, the metal forming the cathode.    Pref. the anode is magnetically enhanced the metal is non-galvanised steel e.g. cold rolled or bare steel. The pretreatment uses DC or AC and the metal is anode or cathode. Hydrogen is used as a carrier gas for the organic cpd. which may be methysilane, trimethylsilane, dimethylsilane, tetramethylsilane, methane or mixts. The primer is epoxy-amine or epoxy-polyester melamine. A mono-coat, base-coat or base-coat and clear-coat finish may be applied over the primer. The gas used in the pretreatment may further contain He, Ne or e but pref. contains 20-80 mole % H2 and 80-20 mole % Ar. More than one treatment may be given.    USE/ADVANTAGE -   Corrosion protection of various forms of steel, Al, Cu and brass used for pre-assembled autobodies, autobody parts, rolls, coils, sheets, etc..    (JP7504943-W)      Protecting (un)galvanised metal against corrosion comprises plasma pretreatment of the metal with a gas comprising H2 and/or Ar, plasma deposition of a thin polymeric film and cathodic electrodeposition of an organic primer coating. Plasma deposition involves polymerisation of an organic cpd. as a film using DC power in a vacuum chamber enclosing a cathode and an anode, the metal forming the cathode.    Pref. the anode is magnetically enhanced the metal is non-galvanised steel e.g. cold rolled or bare steel. The pretreatment uses DC or AC and the metal is anode or cathode. Hydrogen is used as a carrier gas for the organic cpd. which may be methylsilane, trimethylsilane, dimethylsilane, tetramethylsilane, methane or mixts. thereof. The primer is epoxy-amine or epoxy-polyester melamine. A monocoat, basecoat or basecoat and clearcoat finish may be applied over the primer. The gas used in the pretreatment may further contain He, Ne or Te but pref. contains 20-80 mole % H2 and 80-20 mole % Ar. More than one treatment may be given.    USE/ADVANTAGE -   Corrosion protection of various forms of steel, Al, Cu and brass used for preassembled autobodies, autobody parts, rolls, coils, sheets,