A terminal sealed portion is formed on an end portion of a hollow rod made of steel. An enclosed space is formed on an inner side of the hollow rod. At an end of the enclosed space, a terminal gap is formed. A volatile powdered rust inhibitor is supplied in the enclosed space. As the volatile powdered rust inhibitor is vaporized, the enclosed space is turned into a rust-inhibiting atmosphere. As the vaporized component of the volatile powdered rust inhibitor is adsorbed to an inner surface of the enclosed space, an inner surface rust-inhibiting film is formed. The vaporized component also enters inside the terminal gap, and forms a terminal rust-inhibiting film.
Hollow spring member and manufacturing method therefor
2022-03-29
Patent
Electronic Resource
English
HOLLOW SPRING MEMBER AND HOLLOW SPRING MEMBER PRODUCTION METHOD
European Patent Office | 2019
|Hollow spring member and hollow spring member production method
European Patent Office | 2021
|