公开(公告)号：US20190030980A1

公开(公告)日：2019-01-31

申请号：US16146269

申请日：2018-09-28

Applicant: NHK SPRING CO., LTD.

Inventor： Akira TANGE ,  Masato SUGAWARA ,  Yutaka WAKABAYASHI

IPC: B60G21/055

Abstract: 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.