MICROORGANISM-CONTAINING STEEL ANTICORROSION COMPOSITION

• Main Author: YAMASHITA MASATO
• Format: Patent
• Language: English; Japanese
• Published: 20.12.2022
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE

To provide a microorganism-containing steel anticorrosion composition that can impart high corrosion resistance by coating on steel, etc., and to provide a coated steel obtained using the same.SOLUTION: The steel anticorrosion composition contains a microorganism, a water-soluble metal compound, and, as necessary, a solvent or the like capable of dissolving the metal compound. The microorganism is a microorganism having extracellular electron transfer ability such as metal-reducing bacteria, and bacteria belonging to the genera Shewanella, Geobacter, Desulfuromonas, Rhodoferax, Sulfurospirillum, or Pseudomonas can be exemplified. The metal compound is a compound having a solubility of 0.01 g or more at 5°C, and sulfate such as nickel sulfate, aluminum sulfate, copper sulfate, tin sulfate, chromium sulfate, calcium sulfate, cobalt sulfate, and zinc sulfate can be exemplified. The solvent is a liquid that dissolves the metal compound and allows the microorganism to act, and a typical example is water.SELECTED DRAWING: Figure 1 【課題】鋼材等に対して塗布するなどにより高い耐食性を付与することができる微生物を含有する鋼材防食用組成物及びこれを用いて得られる被覆鋼材を提供する。【解決手段】鋼材防食用組成物は微生物と、水溶性の金属の化合物と、必要に応じ当該金属の化合物を溶解することができる溶媒等を含む。微生物は金属還元細菌などの細胞外電子伝達能を有する微生物であり、Ｓｈｅｗａｎｅｌｌａ属、Ｇｅｏｂａｃｔｅｒ属、Ｄｅｓｕｌｆｕｒｏｍｏｎａｓ属、Ｒｈｏｄｏｆｅｒａｘ属、Ｓｕｌｆｕｒｏｓｐｉｒｉｌｌｕｍ属、またはＰｓｅｕｄｏｍｏｎａｓ属の細菌が例示できる。金属の化合物は５℃で０．０１ｇ以上の溶解度を有する化合物であり、硫酸ニッケル、硫酸アルミニウム、硫酸銅、硫酸スズ、硫酸クロム、硫酸カルシウム、硫酸コバルト、及び、硫酸亜鉛などの硫酸塩が例示できる。溶媒は金属の化合物を溶解させるとともに当該微生物が活動できる液体であり、代表例としては水である。【選択図】図１