Process for producing heat pipe

Details Process for producing heat pipe Process for producing heat pipe

C - Chemistry, Metallurgy

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C

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C23C 22/68 (2006.01) C09K 5/04 (2006.01) C23C 22/73 (2006.01) C23F 11/18 (2006.01)

Patent

CA 1273626

ABSTRACT OF THE DISCLOSURE A process for producing a heat pipe including the steps of treating the inner surface of a steel container with an aqueous solution of a vanadate with heating, and enclosing in the container a working liquid prepared by adding an alkalinizing pH adjusting agent to pure water and having an adjusted pH of 8 to 12. When the container inner surface is treated with the aqueous vanadate solution with heating, a protective layer covering the inner surface is formed. The working liquid, when in the range of 8 to 12 in pH, maintains the protective layer in a stable state over a prolonged period of time.

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