| 摘要 |
PURPOSE:To prevent a heat pipe from deteriorating even if the amount of generated hydrogen is high thereby improving the durability and life, by forming a titanium covering layer on at least part or all of the inner surface of a condensing section of a container. CONSTITUTION:At least part or all of the inner surface of a condensing section 1 of a container is formed with a titanium covering layer 3. As the hydrogen partial pressure balances with the pressure of water as operating fluid in the heat pipe, the hydrogen partial pressure particularly at high temperatures is very high relative to that in the atmosphere, and a hydrogen concentration gradient is formed between the outside and inside of the heat pipe. On the other hand, as titanium has such properties that the hydrogen solubility is high but the hydrogen absorbed therein can be released easily, the hydrogen gas in the heat pipe can be quickly absorbed into the titanium coating layer due to the concentration gradient and can be transferred into the iron. The transferred hydrogen migrates in the iron having a high hydrogen diffusion coefficient to part where the concentration gradient is low and then is released into the atmosphere. As a result, hydrogen gas can be prevented from accumulating in the condensing section, and the safe operation can be done perpetually. |
