US 12,092,594 B2
Measurement of metal or alloy coating
Jill F. Geddes, Cambridge (GB); Trevor Lloyd Hughes, Cambridge (GB); and Evgeny Borisovich Barmatov, Cambridge (GB)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/756,917
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Nov. 18, 2020, PCT No. PCT/US2020/060954
§ 371(c)(1), (2) Date Jun. 6, 2022,
PCT Pub. No. WO2021/118773, PCT Pub. Date Jun. 17, 2021.
Claims priority of provisional application 62/947,862, filed on Dec. 13, 2019.
Prior Publication US 2023/0018020 A1, Jan. 19, 2023
Int. Cl. G01N 23/223 (2006.01); G01B 15/02 (2006.01)
CPC G01N 23/223 (2013.01) [G01B 15/02 (2013.01); G01N 2223/076 (2013.01); G01N 2223/507 (2013.01); G01N 2223/61 (2013.01); G01N 2223/633 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for measuring an average thickness of a metal coating or an alloy coating on a metal substrate or an alloy substrate using an X-ray fluorescence (XRF) spectrometer, wherein the metal coating or the alloy coating has an uneven surface with substantially different distances from a measurement window of the X-ray fluorescence spectrometer, the method comprising:
measuring an elemental composition of the metal coating, the alloy coating, the metal substrate, or the alloy substrate using the X-ray fluorescence (XRF) spectrometer; and
obtaining the average thickness of the metal coating or the alloy coating using a calibration relationship between a metal coating thickness or an alloy coating thickness and an elemental composition of the metal coating, the alloy coating, the metal substrate, or the alloy substrate.