	US 11,807,779 B2
	Additive for quality determination of conversion coatings
Sean C. Emerson, Broad Brook, CT (US); Blair A. Smith, South Windsor, CT (US); Weina Li, South Glastonbury, CT (US); Georgios S. Zafiris, Glastonbury, CT (US); and Bart Antonie Van Hassel, Weatogue, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jul. 8, 2021, as Appl. No. 17/370,489.
Application 17/370,489 is a division of application No. 16/152,050, filed on Oct. 4, 2018, granted, now 11,084,942.
Prior Publication US 2021/0332249 A1, Oct. 28, 2021
Int. Cl. C09D 5/00 (2006.01); C09D 5/33 (2006.01); C09D 5/08 (2006.01); C09D 5/22 (2006.01); C09D 5/32 (2006.01); G01N 21/64 (2006.01)

CPC C09D 5/004 (2013.01) [C09D 5/084 (2013.01); C09D 5/086 (2013.01); C09D 5/22 (2013.01); C09D 5/32 (2013.01); G01N 21/6447 (2013.01)]

13 Claims

1. A component comprising:

a substrate; and

a conversion coating thereon, wherein the conversion coating is colorless to human perception and comprises:

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;

wherein the electromagnetic radiation outside the human visual spectrum has a wavelength less than 390 nm or greater than 700 nm.