An enamel powder for manufacturing a coating is present as a mixture which contains 100 parts of a glass powder, 0.1-7.5 parts of ceramic fibers, glass fibers or carbon fibers, and alternatively to one another or in combination with one another 10-21 parts of a powdery oxidic compound of a light metal or 1-5 parts of a powder of a heavy metal. A metal component provided with the enamel powder withstands a flow of hot gas against it. The invention specifies a method, by means of which such metal components can be provided with an enamel coating.

Method for producing a metal coated steel substrate provided with a coating of a primer composition, comprising applying a layer of the primer composition on the metal coated steel substrate wherein the primer composition comprises basic components selected from the group consisting of CuO, K.sub.20, Li.sub.20, Na.sub.20, Ce0.sub.2 and ZnO; components with intermediate acidity selected from the group consisting of Al.sub.20.sub.3, B.sub.20.sub.3, Cr.sub.20.sub.3, Sn0.sub.2 Sb.sub.20.sub.3 and Fe.sub.20.sub.3; acidic components selected from the group consisting of Mn0.sub.2, Mo0.sub.3, P.sub.20.sub.5, Si0.sub.2, Ti0.sub.2, V.sub.20.sub.5, W0.sub.3 and Zr0.sub.2; wherein all wt. % are drawn on the total primer composition and the total sum of the amounts excluding impurities and after normalization is 100 wt. %, wherein all components are expressed as oxides, wherein the sum of the amounts of Ce0.sub.2+Cr.sub.20.sub.3+CuO+Fe.sub.20.sub.3+Mn0.sub.2+Mo0.sub.3+Sn0.sub.2+Sb.sub.20.sub.3+V.sub.20.sub.5 W0.sub.3 is between about 16.7 and about 48.6 wt. %.

A feed-through component for a conductor feed-through which passes through a part of a housing, for example a battery housing, is embedded in a glass or glass ceramic material and has at least one conductor, for example an essentially pin-shaped conductor, and a head part. The surface, in particular the cross-sectional surface, of the head part is greater than the surface, in particular the cross-sectional surface, of the conductor, for example of the essentially pin-shaped conductor. The head part is embodied such that is can be joined to an electrode-connecting component, for example an electrode-connecting part, which may be made of copper, a copper alloy CuSiC, an aluminum alloy AlSiC or aluminum, with a mechanically stable and non-detachable connection.

A glass, for example a glass solder, includes the following components in mole percent (mol-%): P.sub.2O.sub.5 37-50 mol-%, for example 39-48 mol-%; Al.sub.2O.sub.3 0-14 mol-%, for example 2-12 mol-%; B.sub.2O.sub.3 2-10 mol-%, for example 4-8 mol-%; Na.sub.2O 0-30 mol-%, for example 0-20 mol-%; M.sub.2O 0-20 mol-%, for example 12-20 mol-%, wherein M is, for example, K, Cs or Rb; Li.sub.2O 0-42 mol-%, for example 0-40 mol-% or 17-40 mol-%; BaO 0-20 mol-%, for example 0-20 mol-% or 5-20 mol-%; and Bi.sub.2O.sub.3 0-10 mol-%, for example 1-5 mol-% or 2-5 mol-%.

A metal component which has a face which during use is thermally or mechanically more highly loaded than the environment thereof and which is at least partially covered with a glaze or enamel layer and a method for the production thereof. The metal component requires no specific limitations during the thermal processing operation and nonetheless ensures optimum protection for the surfaces which are highly loaded during use. The glaze or enamel layer contains, with respect to the enamel frit used to produce the enamel coating, from 2 to 35% by weight of an admixture of particles which consist of at least one material from glass, organic plastics materials, and synthetic oxide mixtures or melts, which each have a thermal expansion coefficient of a maximum of 5010.sup.7 K.sup.1 and a melting temperature of at least 500 C.

A feed-through, for example a battery feed-through for a lithium-ion battery or a lithium ion accumulator, has at least one base body which has at least one opening through which at least one conductor, for example a pin-shaped conductor, embedded in a glass material is guided. The base body contains a low melting material, for example a light metal, such as aluminum, magnesium, AlSiC, an aluminum alloy, a magnesium alloy, titanium, titanium alloy or steel, in particular special steel, stainless steel or tool steel. The glass material consists of the following in mole percent: 35-50% P.sub.2O.sub.5; 0-14% Al.sub.2O.sub.3; 2-10% B.sub.2O.sub.3; 0-30% Na.sub.2O; 0-20% M.sub.2O, with M being K, Cs or Rb; 0-35% Li.sub.2O; 0-20% BaO; and 0-10% Bi.sub.2O.sub.3, the glass material being free of lead except for contaminants.

A feed-through, in particular a feed-through which passes through part of a housing, in particular a battery housing, for example made of metal, in particular light metal, for example aluminum, an aluminum alloy, AlSiC, magnesium, an magnesium alloy, titanium, a titanium alloy, steel, stainless steel or high-grade steel. The housing part has at least one opening through which at least one conductor, in particular an essentially pin-shaped conductor, embedded in a glass or glass ceramic material, is guided. The base body is, for example, an essentially annular-shaped base body and is hermetically sealed with the housing part such that the helium leakage rate is smaller than 1*10.sup.8 mbar l/sec.

A feed-through, in particular a feed-through which passes through part of a housing, in particular a battery housing, for example made of metal, in particular light metal, for example aluminum, an aluminum alloy, AlSiC, magnesium, an magnesium alloy, titanium, a titanium alloy, steel, stainless steel or high-grade steel. The housing part has at least one opening through which at least one conductor, in particular an essentially pin-shaped conductor, embedded in a glass or glass ceramic material, is guided. The base body is, for example, an essentially annular-shaped base body.

A feed-through, for example a battery feed-through for a lithium-ion battery or a lithium ion accumulator, has at least one base body which has at least one opening through which at least one conductor, for example a pin-shaped conductor, embedded in a glass material is guided. The base body contains a low melting material, for example a light metal, such as aluminum, magnesium, AlSiC, an aluminum alloy, a magnesium alloy, titanium, titanium alloy or steel, in particular special steel, stainless steel or tool steel. The glass material consists of the following in mole percent: 35-50% P.sub.2O.sub.5; 0-14% Al.sub.2O.sub.3; 2-10% B.sub.2O.sub.3; 0-30% Na.sub.2O; 0-20% M.sub.2O, with M being K, Cs or Rb; 0-35% Li.sub.2O; 0-20% BaO; and 0-10% Bi.sub.2O.sub.3, the glass material being free of lead except for contaminants.

A feed-through, for example a battery feed-through for a lithium-ion battery or a lithium ion accumulator, has at least one base body which has at least one opening through which at least one conductor, for example a pin-shaped conductor, embedded in a glass material is guided. The base body contains a low melting material, for example a light metal, such as aluminum, magnesium, AlSiC, an aluminum alloy, a magnesium alloy, titanium, titanium alloy or steel, in particular special steel, stainless steel or tool steel. The glass material consists of the following in mole percent: 35-50% P.sub.2O.sub.5, for example 39-48%; 0-14% Al.sub.2O.sub.3, for example 2-12%; 2-10% B.sub.2O.sub.3, for example 4-8%; 0-30% Na.sub.2O, for example 0-20%; 0-20% M.sub.2O, for example 12-20%, wherein M is K, Cs or Rb; 0-10% PbO, for example 0-9%; 0-45% Li.sub.2O, for example 0-40% or 17-40%; 0-20% BaO, for example 5-20%; 0-10% Bi.sub.2O.sub.3, for example 1-5% or 2-5%.