US 2021/0332249 A1 · ADDITIVE FOR QUALITY DETERMINATION OF CONVERSION COATINGS

Abstract

A method of applying a trivalent chromium or chromium-free conversion coating to a metallic substrate including mixing a dye compound that interacts with electromagnetic radiation outside the human visual spectrum but not electromagnetic radiation that is within the human visual spectrum to produce an observable emission into the trivalent chromium or chromium-free conversion coating mixture to allow for inspection of the coating after applied with a correlating electromagnetic radiation source.

Claims12

Dependent claims

A component comprising:

a substrate;
and
a conversion coating thereon comprising:
a corrosion inhibiting compound;
and
a dye compound, wherein the dye compound interacts with electromagnetic radiation outside the human visual spectrum to produce an observable emission, the dye compound comprises phosphorescent molecules selected from the group consisting of strontium aluminates, lanthanide doped strontium aluminates, manganese doped strontium aluminates, and copper activate zinc sulfide.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/370,489Filed 8 Jul 2021

Priority

4 Oct 2018

Published

28 Oct 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C09D 5/004
Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced ; Filling pastes:…
C09D 5/08
Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced ; Filling pastes:…
C09D 5/084
Characterised by the anti-corrosive pigment: inorganic compounds
C09D 5/086
Characterised by the anti-corrosive pigment: organic or non-macromolecular compounds

Additive for quality determination of conversion coatings

Life of this patent

Additive for quality determination of conversion coatings

Life of this patent

Abstract

Claims12