Corrosion protection for cast iron pipes and method for producing same
AssigneeDuktus Rohrsysteme Wetzlar GmbH
InventorFriedrich Karau
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Abstract
The invention relates to corrosion-protected ductile cast iron pipes, a method for producing corrosion-protected ductile cast iron pipes, and the use of specific compositions for producing corrosion-protected ductile cast iron pipes. More particularly, the invention relates to corrosion protection for ductile cast iron pipes using latex-modified cement mortars based on calcium-aluminum cements.
Claims30
A ductile cast iron pipe having a surface, at least a part of said surface comprising a coating of a latex-modified cement mortar, wherein said latex-modified cement mortar is a cement mortar comprising a calcium aluminate cement composition that comprises the following:
- at least 5% by mass of CaAl2O4 based on 100% by mass of dry calcium aluminate cement composition,
- at least 5% by mass of Ca3Al2O6 based on 100% by mass of dry calcium aluminate cement composition, and
- at least one inorganic filler.
A method for producing a coated ductile cast iron pipe, said method comprising the steps of:
- providing a ductile cast iron pipe, said ductile cast iron pipe comprising a surface, and
- coating at least part of said surface of said ductile cast iron pipe with a latex-modified cement mortar, wherein said latex-modified cement mortar is a cement mortar comprising a calcium aluminate cement composition that comprises—
- at least 5% by mass of CaAl2O4 based on 100% by mass of dry calcium aluminate cement composition,
- at least 5% by mass of Ca3Al2O6 based on 100% by mass of dry calcium aluminate cement composition, and
- at least one inorganic filler.
Dependencies are inferred from the claim text.