Subcommittee on Surface Preparation for Steel Structures
Committee Overview
【Subcommittee Name】
Subcommittee on Surface Preparation of Steel Structures
【Objectives】
Severe corrosion of steel structures exposed to atmospheric environments has been widely reported due to the deposition of salts such as airborne sea salt and deicing agents. Once severe corrosion occurs, it becomes difficult to completely remove rust containing salts during surface preparation for repainting, and many cases of premature deterioration have been reported. In addition, heavily corroded weathering steel forms a hard and dense rust layer, making it extremely difficult to restore the steel substrate using conventional surface preparation methods. Furthermore, metal spraying requires higher-quality steel surface preparation than painting, while CFRP reinforcement raises concerns about galvanic corrosion and debonding of CFRP materials due to degradation of the adhesive interface. Thus, the required performance and technical challenges associated with surface preparation are diverse.
To economically and effectively extend the service life of steel structures, it is essential to resolve the above-mentioned issues related to steel surface preparation and to ensure a level of steel substrate quality that maintains both corrosion protection performance and structural performance over the long term. Accordingly, this Committee focuses on surface preparation of existing steel structures and compiles information on the applicability, precautions, and technical issues associated with surface preparation technologies for coatings, metal spraying, weathering steel, and bonding of CFRP materials, together with the latest findings and emerging technologies.
Committee Members
| Position | Name | Affiliation |
|---|---|---|
| Chair | Shigenobu Kainuma | Kyushu University |
| Secretary-General | Hironori Ishii | Yokogawa Bridge Holdings Corp. |
| Member | Yuya Aono | Honshu-Shikoku Bridge Expressway Company Limited |
| Member | Hiroyuki Aoyagi | Kawakin Core-Tech Co., Ltd. |
| Member | Katsushi Amo | Usami Shokai Co., Ltd. |
| Member | Shinpei Ikeda | Fukuoka-Kitakyushu Expressway Public Corporation |
| Member | Tatsuya Ikeda | Ikeda Kogyo Co., Ltd. |
| Member | Toshiyuki Ishikawa | Kansai University |
| Member | Masato Ishikawa | Docon Co., Ltd. |
| Member | Hiroshi Inada | Miyaji Engineering Co., Ltd. |
| Member | Daisuke Uchida | Hosei University |
| Member | Takahide Osawa | Japan Paint Manufacturers Association |
| Member | Makoto Oya | National Institute of Technology, Matsue College |
| Member | Tomonori Orikasa | Shutoko Engineering Company Limited |
| Member | Hiroshi Katsuhara | Honshu-Shikoku Bridge Engineering Co., Ltd. |
| Member | Alan Kim | Graduate School, Kyushu University |
| Member | In-Tae Kim | Pusan National University |
| Member | Ryoki Kimura | Kawakin Core-Tech Co., Ltd. |
| Member | Takeshi Kodera | Kyokuto Metalicon Industry Co., Ltd. |
| Member | Tatsuro Sakamoto | Railway Technical Research Institute |
| Member | Shunta Sakurai | Nippon Steel Chemical & Material Co., Ltd. |
| Member | Keigo Suzuki | University of Fukui |
| Member | Shunsuke Tanaka | Construction Technology Research Department, Japan Construction Machinery and Construction Association |
| Member | Yoshihito Tomiyama | Public Works Research Institute |
| Member | Yusuke Toyoda | West Nippon Expressway Company Limited |
| Member | Taishi Nakayama | Sagano Scenic Railway Co., Ltd. |
| Member | Miki Nishimura | Hanshin Expressway Company Limited |
| Member | Masashi Hattori | Central Nippon Expressway Company Limited |
| Member | Yuya Hamasaki | Yamakawa Sangyo Co., Ltd. |
| Member | Kunihiko Hirono | NEXCO West Japan Innovations Co., Ltd. |
| Member | Kazuhisa Fujita | Graduate School for the Creation of New Photonics Industries |
| Member | Daiki Fujimoto | Central Japan Railway Company |
| Member | Masatoshi Maeda | Central Research Institute of Electric Power Industry, Yokosuka Area |
| Member | Masazumi Miura | Public Works Research Center |
| Member | Kazuya Yamashita | Hinode Holdings Co., Ltd. |
| Member | Muye Yang | Graduate School, Kyushu University |
| Member | Hiromitsu Yurino | Yokogawa Bridge Corp. |
| Member | Keiichi Yoshino | Tokyo Electric Power Company Holdings, Inc. |
| Member | Arata Wada | Metropolitan Expressway Company Limited |
| Member | Koki Wada | Dai Nippon Toryo Co., Ltd. |
Last Updated：2026/04/07
Activities
【WG Activities】
The Committee conducts activities through the following seven working groups.
WG1: Hand Tools and Power Tools (Leader: Committee Member Arata Wada)
WG2: Blasting (Leader: Committee Member Masashi Hattori)
WG3: New Technologies (Leaders: Committee Members Kazuhisa Fujita and Yusuke Toyoda)
WG4: Coatings (Leader: Committee Member Yuta Sasaki)
WG5: Weathering Steel (Leader: Committee Member Makoto Oya)
WG6: Metallic Coatings (Leaders: Committee Members Takeshi Anan and Masatoshi Maeda)
WG7: CFRP (Leader: Committee Member Toshiyuki Ishikawa)
【Priority Research Project】
The following research project was selected as a 2023 Priority Research Project of the Steel Structures Committee and was carried out.
Research Title: Materials-Chemistry Analysis of Corroded Steel for Evaluating Surface Preparation Quality
Research Overview:
Insufficient surface preparation of severely corroded areas often results in localized under-film corrosion occurring and progressing soon after repainting, and cases leading to member fracture have also been reported. To address this issue, the Committee is working to analyze steel surfaces after various surface preparation methods have been applied to severely corroded areas and to propose construction methods that ensure sufficient surface quality to prevent renewed deterioration. To achieve this objective, steel surfaces were scientifically analyzed after various surface preparation methods had been applied to severely corroded steel plates, and the quality of the prepared surfaces was quantitatively evaluated.
Following the FY2023 project, the following research has been selected as a 2024 Priority Research Project of the Steel Structures Committee and is currently being conducted.
Research Title:
Development of Equipment for a New Method of Measuring Deposited Salts on Steel Structures and Scientific Analysis for Reliability Evaluation in Practical Application
Research Overview:
Because severely corroded areas have irregular surfaces, conventional salt measurement methods such as the conductivity method and the Bresle method are difficult to apply. To address this issue, the objective is to develop equipment that can easily smooth the surface to which a Bresle patch is attached, thereby enabling salt measurement after surface preparation of areas with severe salt deposition. After development of the equipment, trial applications and test measurements will be performed on severely corroded surfaces, and anions such as Cl will be analyzed using ion chromatography.
【Committee Meeting History】
1st Committee Meeting: June 27, 2023 (JSCE Auditorium) 2nd Committee Meeting: September 7, 2023 (JSCE Auditorium) 3rd Committee Meeting: January 18, 2024 (Kyushu University) 4th Committee Meeting: June 18, 2024 (Tokyo Paint Hall) 5th Committee Meeting: October 17, 2024 (Yokogawa Bridge Holdings Headquarters) 6th Committee Meeting: June 3, 2025 (JSCE Auditorium) 7th Committee Meeting: September 4, 2025 (JSCE Auditorium) 8th Committee Meeting: January 9, 2026 (Yokogawa Bridge Holdings Headquarters)