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US 11,713,398 B2Granted
Corrosion protecting layer system, corrosion protected bearing component and method for protecting a bearing component against corrosion
AssigneeAktiebolaget Skf
InventorThilo von Schleinitz
Life of this patent
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Abstract
A corrosion-protecting layer system, e.g., for a bearing component used in a wind turbine, includes a base layer that contains polyurethane, zinc, and vinylphosphonic acid or silane. An intermediate layer is formed on the base layer and contains polyurethane and zinc. A top layer is formed on the intermediate layer and contains polyurethane and micaceous iron oxide. A sealing layer is formed on the top layer and contains polyurethane.
Claims16
A method for protecting a bearing component against corrosion, comprising:
- applying and curing a first varnish based on polyurethane into which a first quantity of zinc particles have been mixed and into which either vinylphosphonic acid or silane has been mixed, to form a base layer on a surface region of the bearing component, applying and curing a second varnish based on polyurethane, to which a second quantity of zinc particles have been added, to form an intermediate layer on the base layer,
- applying and curing a third varnish based on polyurethane, to which micaceous iron oxide has been added, to form a top layer on the intermediate layer, and
- applying and curing a fourth varnish based on polyurethane to form a sealing layer on the top layer,
- wherein, to form the intermediate layer, the second varnish is applied in a plurality of partial layers, and/or to form the top layer, the third varnish is applied in a plurality of partial layers.
1 more element
A coating that protects against corrosion, comprising:
- a base layer formed by curing a first mixture containing polyurethane, a first quantity of zinc particles, and at least one adhesion promoter selected from the group consisting of a vinylphosphonic acid and a silane,
- an intermediate layer adhered to the base layer, the intermediate layer being formed by applying a second mixture containing polyurethane and a second quantity of zinc particles to the cured base layer and then curing the intermediate layer,
- a top layer adhered to the intermediate layer, the top layer being formed by applying a third mixture containing polyurethane and micaceous iron oxide to the cured intermediate layer and then curing the top layer, and
- a sealing layer adhered to the top layer, the sealing layer being formed by applying a fourth mixture containing polyurethane to the cured top layer and then curing the sealing layer,
- wherein the intermediate layer and/or the top layer are formed from a plurality of partial layers.
2 more elements
Dependencies are inferred from the claim text.