Patent · US Expired

Prevention of corrosion

US4689201A · kind A · utility

11Cited by
7References
66Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 5, 1985
Grant dateAug 25, 1987
Priority date—
Expiry dateMar 5, 2005

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC23F11/08
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

Corrosion in liquid, especially aqueous systems such as cooling systems, is controlled by the addition of a vegetable tannin or a derivative thereof, a triazole, a hydroxylamine, a neutralizing amine, and a water soluble salt of a Group II metal, in particular zinc, magnesium or calcium.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.