【発明の名称】ステンレス鋼アルカリ処理

Title:

【発明の名称】ステンレス鋼アルカリ処理

Document Type and Number:

Japanese Patent JP2941949

Kind Code:

B2

Abstract:

The invention includes a method for cleaning and passivating a stainless steel surface comprising: 1) contacting the surface with 15-45 ml/liter of a composition consisting essentially of between about 15 and 50% alkaline component, between about 1 to 15% chelant, and between about 35 to 84% water; 2) maintaining contact to dislodge and remove residue from the surface; 3) continuing contact to complex free iron ions liberated from the surface with the chelant to form an oxide film on the surface; and 4) continuing contact to precipitate the complexed ions into the oxide film. The compositions may further include a surfactant selected from the group consisting of anionic, cationic, nonionic and zwitterionic surfactants to enhance cleaning performance.

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Inventors:

SHAA SADEITSUKU
KAACHINAA FURETSUDO

Application Number:

JP51191996A

Publication Date:

August 30, 1999

Filing Date:

September 22, 1995

Export Citation:

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Assignee:

KARUGON BESUTARU INC

International Classes:

C23C22/62; C23G1/19; (IPC1-7): C23G1/19; C23C22/62

Domestic Patent References:

JP5075129A

Other References:

【文献】米国特許3506576(US,A)

Attorney, Agent or Firm:

Shusaku Yamamoto

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