Patent · US Active

Release on demand corrosion inhibitor composition

US8241524B2 · kind B2 · utility

4Cited by
4References
59Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 18, 2009
Grant dateAug 14, 2012
Priority date
Expiry dateAug 13, 2030

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC09D139/04
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

Disclosed is a release on demand type corrosion inhibitor composition for a metal substrate formed from only non-electrically conductive film forming copolymer(s); a nitrogen containing functional group X, where the group X comprises a pyridine, a dihydropyridine, a pyrrole, an imidazole, or a mixtures thereof; and a metallate anion. The metallate anion binds to a nitrogen in the functional group X by ion pairing. A localized rise in pH is believed to cause release of the anion via a protonation/deprotonation reaction and the released anion suppresses the corrosion formation. The coating composition includes no electrically conductive polymers.

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