Seiji Kishikawa

Title: **Seiji Kishikawa: Innovating Corrosion Resistance Solutions**

Introduction

Seiji Kishikawa is a distinguished inventor based in Tokyo, Japan, known for his contributions to the field of surface treatment technology. With a total of two patents to his name, Kishikawa has made significant advancements in the development of black chromate solutions that enhance the corrosion resistance of metals.

Latest Patents

One of Kishikawa's notable inventions is a patented black chromate-treatment solution designed for zinc-nickel alloy plated films. This innovative solution comprises 1 to 100 g/l of hexavalent chromium, along with varying amounts of hydrochloric and sulfuric acid residues, nitric acid residues, and selected metals such as iron, nickel, cobalt, and copper. The solution allows for the formation of a uniform black chromate conversion film on Zn-Ni alloy plated films with an Ni content of 8 to 20% by weight. Significantly, it does this without relying on silver ions in substantial quantities, leading to excellent corrosion resistance of the resulting black film.

Another patent of Kishikawa's involves a chemically stable black chromate solution capable of forming an anticorrosive black chromate film on Zn-Ni alloy plating. This solution's components are easily soluble, comprising 1 to 50 g/l of hexavalent chromium, 1 to 50 g/l of sulfate ions, 0.05 to 1.0 g/l of soluble silver, and 0.5 to 100 g/l of specific sulfonated carboxylic acids, balanced with water to achieve a pH range of 0.5 to 2.5.

Career Highlights

Kishikawa’s career is marked by his association with Dipsol Chemicals Co., Ltd., where he has been instrumental in advancing surface treatment technologies. His work not only showcases his innovative spirit but also contributes to the industrial applications of corrosion-resistant solutions.

Collaborations

Throughout his career, Kishikawa has collaborated with notable colleagues such as Hitoshi Sakurai and Tomitaka Yamamoto. These partnerships have likely enriched his research and development efforts, leading to enhanced findings in the field of black chromate treatments.

Conclusion

Seiji Kishikawa's inventive contributions to the development of black chromate solutions underscore the importance of innovation in enhancing material resistance to corrosion. His work at Dipsol Chemicals Co., Ltd. exemplifies how targeted research can lead to significant advancements in industrial applications, reflecting the potential for further innovations in this crucial area of surface treatment technologies.