Formation of chromate conversion coatings on Al-Cu-Mg intermetallic compounds and alloys

W. R. McGovern; P. Schmutz; R. G. Buchheit; R. L. McCreery

doi:10.1149/1.1394091

Formation of chromate conversion coatings on Al-Cu-Mg intermetallic compounds and alloys

W. R. McGovern, P. Schmutz, R. G. Buchheit, R. L. McCreery

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

Chromium conversion coating (CCC) formation was monitored on copper-containing aluminum alloys AA2024-T3 and a specially cast Al_xCu_yMg_z ingot using Raman spectroscopy of the 860 cm^-1 band. The Al_xCu_yMg_z ingot's different phases were compositionally analyzed with energy-dispersive spectroscopy (EDS) and Auger electron spectroscopy (AES) before and after treatments using commercial Alodine^TM 1200S chromium solution. Profilometry and Raman intensity of the 860 cm^-1 band were used to gauge CCC film thickness on AA-2024-T3 alloy. A linear relationship between CCC thickness and the integrated 860 cm^-1 band was shown to exist on AA-2024 alloy. Raman intensity of the 860 cm^-1 band was also integrated and spatially mapped using commercially available software. These results were verified with AES depth profiling using an Ar⁺ ion sputter. CCC formation was found to be slower on the Al_xCu_yMg_z phases with higher copper content. Similarly, in 2024-T3, CCC formation was suppressed on S-phase Al₂CuMg and `depressed' Al₂₀Cu₂FeMn intermetallics of 2024 aluminum alloy. Fe(CN)₆^3-/4- adsorption on the Al_xCu_yMg_z ingot phases, Cu, Al, Mg, and AA2024-T3 were characterized by Raman in the 2100 cm^-1 range.

Original language	English
Pages (from-to)	4494-4501
Number of pages	8
Journal	Journal of the Electrochemical Society
Volume	147
Issue number	12
DOIs	https://doi.org/10.1149/1.1394091
State	Published - Dec 2000

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1149/1.1394091

Cite this

@article{030067f0ee344f9a80a44279d84df731,

title = "Formation of chromate conversion coatings on Al-Cu-Mg intermetallic compounds and alloys",

abstract = "Chromium conversion coating (CCC) formation was monitored on copper-containing aluminum alloys AA2024-T3 and a specially cast AlxCuyMgz ingot using Raman spectroscopy of the 860 cm-1 band. The AlxCuyMgz ingot's different phases were compositionally analyzed with energy-dispersive spectroscopy (EDS) and Auger electron spectroscopy (AES) before and after treatments using commercial AlodineTM 1200S chromium solution. Profilometry and Raman intensity of the 860 cm-1 band were used to gauge CCC film thickness on AA-2024-T3 alloy. A linear relationship between CCC thickness and the integrated 860 cm-1 band was shown to exist on AA-2024 alloy. Raman intensity of the 860 cm-1 band was also integrated and spatially mapped using commercially available software. These results were verified with AES depth profiling using an Ar+ ion sputter. CCC formation was found to be slower on the AlxCuyMgz phases with higher copper content. Similarly, in 2024-T3, CCC formation was suppressed on S-phase Al2CuMg and `depressed' Al20Cu2FeMn intermetallics of 2024 aluminum alloy. Fe(CN)63-/4- adsorption on the AlxCuyMgz ingot phases, Cu, Al, Mg, and AA2024-T3 were characterized by Raman in the 2100 cm-1 range.",

author = "McGovern, {W. R.} and P. Schmutz and Buchheit, {R. G.} and McCreery, {R. L.}",

year = "2000",

month = dec,

doi = "10.1149/1.1394091",

language = "English",

volume = "147",

pages = "4494--4501",

number = "12",

}

TY - JOUR

T1 - Formation of chromate conversion coatings on Al-Cu-Mg intermetallic compounds and alloys

AU - McGovern, W. R.

AU - Schmutz, P.

AU - Buchheit, R. G.

AU - McCreery, R. L.

PY - 2000/12

Y1 - 2000/12

N2 - Chromium conversion coating (CCC) formation was monitored on copper-containing aluminum alloys AA2024-T3 and a specially cast AlxCuyMgz ingot using Raman spectroscopy of the 860 cm-1 band. The AlxCuyMgz ingot's different phases were compositionally analyzed with energy-dispersive spectroscopy (EDS) and Auger electron spectroscopy (AES) before and after treatments using commercial AlodineTM 1200S chromium solution. Profilometry and Raman intensity of the 860 cm-1 band were used to gauge CCC film thickness on AA-2024-T3 alloy. A linear relationship between CCC thickness and the integrated 860 cm-1 band was shown to exist on AA-2024 alloy. Raman intensity of the 860 cm-1 band was also integrated and spatially mapped using commercially available software. These results were verified with AES depth profiling using an Ar+ ion sputter. CCC formation was found to be slower on the AlxCuyMgz phases with higher copper content. Similarly, in 2024-T3, CCC formation was suppressed on S-phase Al2CuMg and `depressed' Al20Cu2FeMn intermetallics of 2024 aluminum alloy. Fe(CN)63-/4- adsorption on the AlxCuyMgz ingot phases, Cu, Al, Mg, and AA2024-T3 were characterized by Raman in the 2100 cm-1 range.

AB - Chromium conversion coating (CCC) formation was monitored on copper-containing aluminum alloys AA2024-T3 and a specially cast AlxCuyMgz ingot using Raman spectroscopy of the 860 cm-1 band. The AlxCuyMgz ingot's different phases were compositionally analyzed with energy-dispersive spectroscopy (EDS) and Auger electron spectroscopy (AES) before and after treatments using commercial AlodineTM 1200S chromium solution. Profilometry and Raman intensity of the 860 cm-1 band were used to gauge CCC film thickness on AA-2024-T3 alloy. A linear relationship between CCC thickness and the integrated 860 cm-1 band was shown to exist on AA-2024 alloy. Raman intensity of the 860 cm-1 band was also integrated and spatially mapped using commercially available software. These results were verified with AES depth profiling using an Ar+ ion sputter. CCC formation was found to be slower on the AlxCuyMgz phases with higher copper content. Similarly, in 2024-T3, CCC formation was suppressed on S-phase Al2CuMg and `depressed' Al20Cu2FeMn intermetallics of 2024 aluminum alloy. Fe(CN)63-/4- adsorption on the AlxCuyMgz ingot phases, Cu, Al, Mg, and AA2024-T3 were characterized by Raman in the 2100 cm-1 range.

UR - http://www.scopus.com/inward/record.url?scp=0034513120&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034513120&partnerID=8YFLogxK

U2 - 10.1149/1.1394091

DO - 10.1149/1.1394091

M3 - Article

AN - SCOPUS:0034513120

SN - 0013-4651

VL - 147

SP - 4494

EP - 4501

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 12

ER -

Formation of chromate conversion coatings on Al-Cu-Mg intermetallic compounds and alloys

Abstract

ASJC Scopus subject areas

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this