JPS5741378A - Blackening method for copper or copper alloy - Google Patents

Blackening method for copper or copper alloy

Info

Publication number
JPS5741378A
JPS5741378A JP11703680A JP11703680A JPS5741378A JP S5741378 A JPS5741378 A JP S5741378A JP 11703680 A JP11703680 A JP 11703680A JP 11703680 A JP11703680 A JP 11703680A JP S5741378 A JPS5741378 A JP S5741378A
Authority
JP
Japan
Prior art keywords
solar heat
alloy
alkali
soln
blackening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11703680A
Other languages
Japanese (ja)
Inventor
Sadao Yamashita
Kiyoto Ando
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAIEI KINZOKU KOGYO KK
Mitsui Mining and Smelting Co Ltd
Original Assignee
DAIEI KINZOKU KOGYO KK
Mitsui Mining and Smelting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DAIEI KINZOKU KOGYO KK, Mitsui Mining and Smelting Co Ltd filed Critical DAIEI KINZOKU KOGYO KK
Priority to JP11703680A priority Critical patent/JPS5741378A/en
Publication of JPS5741378A publication Critical patent/JPS5741378A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Landscapes

  • Chemical Treatment Of Metals (AREA)

Abstract

PURPOSE: To uniformly form a black oxide film with superior solar heat absorptivity on a molding of Cu or a Cu alloy by immersing the molding in a blackening soln. contg. caustic alkali and specified oxidizing agents.
CONSTITUTION: After degreasing and cleaning the surface of a warm water unit or the like made of Cu or Cu alloy as a body absorbing solar heat energy, the body is dipped in a nitric acid soln. having 300W320g/l concn. at ordinary temp. to smoothen the surface. The smoothened body is then immersed in a blackening soln. contg. 50W70g/l NaOH or other caustic alkali, 15W50g/l alkali persulfate and 5W10g/l alkali nitrate as oxidizing agents at 60W80°C for 5W30min, thus forming a uniform black oxide film with high solar heat energy absorptivity and less radiation loss.
COPYRIGHT: (C)1982,JPO&Japio
JP11703680A 1980-08-27 1980-08-27 Blackening method for copper or copper alloy Pending JPS5741378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11703680A JPS5741378A (en) 1980-08-27 1980-08-27 Blackening method for copper or copper alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11703680A JPS5741378A (en) 1980-08-27 1980-08-27 Blackening method for copper or copper alloy

Publications (1)

Publication Number Publication Date
JPS5741378A true JPS5741378A (en) 1982-03-08

Family

ID=14701846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11703680A Pending JPS5741378A (en) 1980-08-27 1980-08-27 Blackening method for copper or copper alloy

Country Status (1)

Country Link
JP (1) JPS5741378A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162451A (en) * 2011-12-19 2013-06-19 田海金 Spraying manufacturing method of superconduction flat solar energy absorber plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103162451A (en) * 2011-12-19 2013-06-19 田海金 Spraying manufacturing method of superconduction flat solar energy absorber plate

Similar Documents

Publication Publication Date Title
JPS5741378A (en) Blackening method for copper or copper alloy
JPS5741379A (en) Blackening method for copper or copper alloy
JPS5698495A (en) Surface treatment method of magnesium or its alloy
JPS5270441A (en) Solar heat water heater
JPS5457264A (en) Heat exchanger
US6003509A (en) Solar collector and method for production thereof
JPS57185986A (en) Production of solar heat absorbing body
JPS5694155A (en) Process for making selective absorption film for solar energy
JPS56142347A (en) Production of solar heat absorbing body
JPS51129961A (en) Heat exchanger
JPS5694153A (en) Process for making solar energy selective absorption film
JPS57152469A (en) Surface treatment of al alloy for providing superior pitting corrosion resistance
JPS5453638A (en) Production of selectively absorbing face
JPS55154599A (en) Plating method for aluminum or its alloy
JPS56168097A (en) Double tube heat exchanger
JPS5723065A (en) Preparation of selective absorbing surface of solar energy collector
JPS5785998A (en) Production of absorptive plate for solar heat energy
JPS57155058A (en) Solar heat absorbing body
JPS5714154A (en) Manufacture of heat-resistant solar energy selective absorption surface
JPS56162364A (en) Heat collector for light energy
JPS5662992A (en) Forming method for corrosion-proof anodic oxidation film having thick electrodeposition coating film
JPS5721755A (en) Producing method of solar heat collection plate
JPS5676434A (en) Antifogging treatment of acetate plastic substrate
JPS5779195A (en) Surface treatment of titanium or its alloy
JPS5694157A (en) Process for making solar energy selective absorption film