Highly corrosion resistant copper tube
AssigneesUacj Corporation, Uacj Copper Tube Corporation
InventorsMasaki KUMAGAI, Yoshihiko KYO, Saori MAE
Life of this patent
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Abstract
The purpose of the present invention is to provide a copper pipe that is capable of exhibiting higher corrosion resistance with respect to formicary corrosion, can be suitably used in air conditioners and freezing equipment, and has excellent long-term anti-corrosion properties, and to advantageously improve the service life of equipment configured using such copper pipe. The copper pipe is configured from a material, which contains P (phosphorus) in a proportion of 0.15-0.50 weight %, in which oxygen content is 30 ppm by weight or less, and the balance is made of Cu and unavoidable impurities.
Claims8
A highly corrosion-resistant copper tube which is formed of a copper material comprising a copper alloy consisting of 0.15-0.50% by weight of phosphorus and the balance being copper and inevitable impurities, the copper material having an oxygen content of not higher than 30 ppm by weight.
A method of improving a corrosion resistance of a copper tube against ant nest corrosion which is generated by a corrosive medium in the form of a lower carboxylic acid in a damp environment and progresses from a surface of the copper tube used for air-conditioning equipment or refrigerating equipment in the damp environment, wherein
- the copper tube is formed of a copper material comprising a copper alloy consisting of 0.15-0.50% by weight of phosphorus and the balance being copper and inevitable impurities, the copper material having an oxygen content of not higher than 30 ppm by weight.
Dependencies are inferred from the claim text.