Surface Treatment and Facilitated Cleaning of Stainless Steel by Ozonized Air.

• FUKUZAKI SATOSHI

  Industrial Technology Center of Okayama Prefecture

• URANO HIROMI

  Industrial Technology Center of Okayama Prefecture

• HIRAMATSU MINORU

  Industrial Technology Center of Okayama Prefecture

• TAKEHARA ATSUHIKO

  Industrial Technology Center of Okayama Prefecture

抄録

Surface treatment of stainless steel by ozonized air was investigated over the range of 0.01 to 0.2% (v/v) ozone (O₃), using nonporous stainless steel particles. Ozonized air contained nitrogen oxides (NO_x) at a NO_x/O₃ ratio of approximately 0.04. When stainless steel particles were treated with ozonized air, nitric acid was formed on their surfaces depending on the O₃ concentration. As a result of ozonized air treatment, the adsorption affinity of water vapor for stainless steel particles decreased and the absolute values of the apparent surface charge density (σ_app) of stainless steel particles decreased over the pH range of 3 to 10, resulting in the lower adsorption affinity of bovine serum albumin (BSA). The σ_app curves of stainless steel particles treated with ozonized air at 0.15 to 0.2% O₃ were very similar to the curves of the particles treated with 10 and 30% HNO₃. These results indicated that nitric acid formed during ozonized air treatment brought about the modification of the surface charge of stainless steel particles. Ozonized air pretreatment of stainless steel particles fouled with BSA or calcium hydrogenphosphate markedly facilitated their removal during subsequent alkali cleaning or rinsing through O₃ oxidation or descaling with nitric acid.

収録刊行物

• Ｂｉｏｃｏｎｔｒｏｌ　Ｓｃｉｅｎｃｅ

  Ｂｉｏｃｏｎｔｒｏｌ　Ｓｃｉｅｎｃｅ 6 (2), 95-101, 2001

  日本防菌防黴学会

キーワード

• Facilitated cleaning
• Stainless steel
• Ozonized air
• Nitric acid
• Surface treatment

詳細情報

• CRID: 1390282679441624064
• NII論文ID: 10011318329
• NII書誌ID: AA11169621
• DOI: 10.4265/bio.6.95
• COI: 1:CAS:528:DC%2BD3MXntlelsLw%3D
• ISSN: 18840205
• ISSN: 13424815
• ISSN: http://id.crossref.org/issn/13424815
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可