Selective dissolution during acid pickling of aluminum alloys by element-resolved electrochemistry

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Sultan, B Bin MohamadRISE,Korrosion,PSL Research University, Paris,Institut de La Corrosion (författare)

Funding text 1: The authors would like to thank the Agence National Recherche Technologie (ANRT) for partial financing; Dr. Lionel Peguet of Constellium, SE and Dr. Gregory Lefevre of Chimie-ParisTech for useful discussions; and Dr. Patrick Chapon of Horiba European Research Center for assistance with the GDOES experiments.
The surface reactivity and the elemental dissolution of a high-strength aerospace alloy (AA7449-T651) during acid pickling was investigated with element-resolved electrochemistry (AESEC). The results demonstrated a sequential dissolution of Mg, Al, Zn and Cu, following the order of their respective galvanic reactivity in common acid pickling solutions. The enrichment of Cu during pickling with the H2SO4 solution was observed. The effect of oxidizing solution components HNO3 and Fe(III) on Cu dissolution were investigated using an experimental Evans diagram approach.

TEKNIK OCH TEKNOLOGIER Materialteknik Metallurgi och metalliska material hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Metallurgy and Metallic Materials hsv//eng
AA7449
Acid pickling
AESEC
Alloy
Aluminum
Aluminum alloys
Copper
Dissolution
Electrochemistry
Iron compounds
Aerospace alloys
Cu dissolutions
High-strength
Pickling solutions
Selective dissolution
Solution components
Surface reactivity
High strength alloys

Thierry, DominiqueRISE,Korrosion,Institut de la Corrosion(Swepub:ri)DominiqueTh@ri.se (författare)
Torrescano-Alvarez, J. M.PSL Research University, Paris (författare)
Ogle, K.PSL Research University, Paris (författare)
RISEKorrosion (creator_code:org_t)

Av författaren/redakt...: Sultan, B Bin Mo ...; Thierry, Dominiq ...; Torrescano-Alvar ...; Ogle, K.

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Metallurgi och m ...

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