Abstract: A process for applying an adherent electrically insulative moisture-resistant composite coating to a substrate. A thin, adherent, highly cross-linked, substantially liquid moisture-impervious primer coating is provided on the substrate by glow discharge polymerization of a low molecular weight hydrocarbon monomer in a low pressure chamber containing the substrate, the monomer being selected from among methane, ethane, propane, ethylene, and propylene. A second polymeric coating layer is provided over the primer coating by glow discharge polymerization of a second precursor comprising a hydrocarbon or substituted hydrocarbon. The precursor exhibits a hydrogen yield of not greater than about 0.75 hydrogen atoms per molecule under the glow discharge polymerization conditions under which the second layer is deposited, whereby the second polymeric coating layer is substantially resilient and strongly bonded to the primer coating and the second layer comprises a high concentration of surface and bulk free radicals.

Abstract: A process for applying an adherent electrically insulative moisture-resistant composite coating to a substrate. A thin, adherent, highly cross-linked, substantially liquid moisture-impervious primer coating is provided on the substrate by glow discharge polymerization of a low molecular weight hydrocarbon monomer in a low pressure chamber containing the substrate, the monomer being selected from among methane, ethane, propane, ethylene, and propylene. A second polymeric coating layer is provided over the primer coating by glow discharge polymerization of a second precursor comprising a hydrocarbon or substituted hydrocarbon. The precurser exhibits a hydrogen yield of not greater than about 0.75 hydrogen atoms per molecule under the glow discharge polymerization conditions under which the second layer is deposited, whereby the second polymeric coating layer is substantially resilient and strongly bonded to the primer coating and the second layer comprises a high concentration of surface and bulk free radicals.

Abstract: A process for applying an adherent electrically insulative moisture-resistant composite coating to a substrate. A thin, adherent, highly cross-linked, substantially liquid moisture-impervious primer coating is provided on the substrate by glow discharge polymerization of a low molecular weight hydrocarbon monomer in a low pressure chamber containing the substrate, the monomer being selected from among methane, ethane, propane, ethylene, and propylene. A second polymeric coating layer is provided over the primer coating by glow discharge polymerization of a second precursor comprising a hydrocarbon or substituted hydrocarbon. The precursor exhibits a hydrogen yield of not greater than about 0.75 hydrogen atoms per molecule under the glow discharge polymerization conditions under which the second layer is deposited, whereby the second polymeric coating layer is substantially resilient and strongly bonded to the primer coating and the second layer comprises a high concentration of surface and bulk free radicals.

Abstract: An oxygen electrode adapted for use for polarographic, galvanometric or amperometric analyses, that is resistant to poisoning and effective for accurate, reproducible current and voltage measurements. The electrode comprises a conductive sensing member having a working surface which is comprised of a metal that catalyzes the cathodic reduction of oxygen and which is adapted to communicate with an oxygen-containing environment for carrying out such reduction. At the working surface is a layer of an oxide of the aforesaid metal. An insulating jacket covers all of the member except the working surface. There is a thin polymeric coating over said oxide layer and securely adhered to the working surface. The coating comprises a polymer produced by glow discharge polymerization of an aliphatic hydrocarbon and has such properties as to permit the reduction of oxygen at the electrode by electrons supplied at the working surface through the conductive member.A method for preparing the electrode is also disclosed.

Abstract: An oxygen electrode adapted for use for polarographic, galvanometric or amperometric analyses, that is resistant to poisoning and effective for accurate,reproducible current and voltage measurements. The electrode comprises a conductor constituted of a metal which catalyzes the cathodic reduction of oxygen, an electrical lead electrically connected to the conductor, and an insulating jacket covering all of the conductor except a working surface thereof that is adapted to communicate with an oxygen-containing environment for the cathodic reduction of oxygen. The conductor has a layer of an oxide of the aforesaid metal at its working surface. There is a thin polymeric coating over said oxide layer and securely adhered to the working surface. The coating comprises a polymer produced by glow discharge polymerization of an aliphatic hydrocarbon and has such properties to permit the reduction of oxygen at the electrode by electrons supplied at the working surface through the lead and conductor.