METHOD OF TREATING SURFACE OF IRONNCONTAINING METAL

Title:

METHOD OF TREATING SURFACE OF IRONNCONTAINING METAL

Document Type and Number:

Japanese Patent JPS52111834

Kind Code:

A

Abstract:

A method for passivating acid-cleaned ferrous metal surfaces is disclosed. The method features the use of an aqueous passivating solution having a pH of greater than about 8, comprising a base, an oxygen containing gas, and one of hydrazine, an iron complexing agent and mixtures thereof, wherein the method comprises contacting an acid-cleaned ferrous metal surface with the passivating solution at temperatures up to about 400 DEG F or greater.

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Inventors:

RARII DEII MAATEIN
UIRIAMU PII BANKUSU

Application Number:

JP2853477A

Publication Date:

September 19, 1977

Filing Date:

March 15, 1977

Export Citation:

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Assignee:

HALLIBURTON CO

International Classes:

C02F5/00; C02F5/08; C02F5/10; C02F5/12; C02F5/14; C23C22/62; C23F11/12; C23F11/18; C23G1/19; (IPC1-7): C02B1/00; C23G1/02

Domestic Patent References:

JPS5075129A	1975-06-20
JPS512418A	1976-01-10
JPS4829633A	1973-04-19

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