Company Filing History:
Years Active: 2003-2006
Title: Shigeyasu Morikawa: Innovator in Corrosion-Resistant Steel Technology
Introduction
Shigeyasu Morikawa is a notable inventor based in Sakai, Japan. He has made significant contributions to the field of materials science, particularly in the development of corrosion-resistant steel sheets. With a total of 3 patents to his name, Morikawa's work has had a lasting impact on the industry.
Latest Patents
One of Morikawa's latest patents focuses on a chemically processed steel sheet that exhibits excellent corrosion resistance. This innovative steel sheet comprises a steel base coated with an Al–Si alloy plating layer. The silicon content is carefully adjusted to 5–13 mass % overall and to 7–80 mass % at the surface. A converted layer is generated on the surface of the plating layer, which contains both soluble and scarcely-soluble compounds. The soluble compounds, such as manganese oxide or hydroxide, are dissolved in water and then re-precipitated as scarcely-soluble compounds at defective parts of the converted layer. These compounds serve as a barrier for corrosion prevention of the base steel. The self-repairing faculty of the re-precipitation process ensures that the excellent corrosion resistance of the converted layer is maintained, even after defects are introduced during the plastic deformation of the steel sheet.
Career Highlights
Morikawa has worked with prominent companies in the steel industry, including Nisshin Steel Co., Ltd. and Nippon Steel Nisshin Co., Ltd. His experience in these organizations has allowed him to refine his expertise in materials engineering and innovation.
Collaborations
Throughout his career, Morikawa has collaborated with talented individuals such as Hirofumi Taketsu and Masaya Yamamoto. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
Shigeyasu Morikawa's contributions to the field of corrosion-resistant steel technology highlight his innovative spirit and dedication to improving material performance. His patents continue to influence the industry and pave the way for future advancements in steel processing.