Steam based conversion coating on AA6060 alloy: Effect of sodium silicate chemistry and corrosion performance

Rameez Ud Din; Kirill Bordo; Naja Tabrizian; Morten Stendahl Jellesen; Rajan Ambat

doi:10.1016/j.apsusc.2017.06.153

Steam based conversion coating on AA6060 alloy: Effect of sodium silicate chemistry and corrosion performance

Rameez Ud Din, Kirill Bordo, Naja Tabrizian, Morten Stendahl Jellesen, Rajan Ambat

Danish Technological Institute

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Surface treatment of aluminium alloy AA6060 using an industrially applicable pilot steam jet system with and without silicate chemistry has been investigated. Treatment using steam alone and steam with silicate, resulted in an oxide layer formation with thickness ∼425 nm and ∼160 nm, respectively. Moreover, the use of sodium silicate resulted in the formation of distinct microstructure and incorporation of silicate into the oxide film. These oxide films reduced the anodic activity 4 times, while the corrosion protection by silicate containing oxide was the function of its concentration. Further, in acid salt spray and filiform corrosion tests, oxide layer containing silicate exhibited two times higher corrosion resistance.

Original language	English
Journal	Applied Surface Science
Volume	423
Pages (from-to)	78-89
ISSN	0169-4332
DOIs	https://doi.org/10.1016/j.apsusc.2017.06.153
Publication status	Published - 2017

Keywords

Aluminum
Intermetallics
Oxidation
Passive films
Polarization
SEM

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title = "Steam based conversion coating on AA6060 alloy: Effect of sodium silicate chemistry and corrosion performance",

abstract = "Surface treatment of aluminium alloy AA6060 using an industrially applicable pilot steam jet system with and without silicate chemistry has been investigated. Treatment using steam alone and steam with silicate, resulted in an oxide layer formation with thickness ∼425 nm and ∼160 nm, respectively. Moreover, the use of sodium silicate resulted in the formation of distinct microstructure and incorporation of silicate into the oxide film. These oxide films reduced the anodic activity 4 times, while the corrosion protection by silicate containing oxide was the function of its concentration. Further, in acid salt spray and filiform corrosion tests, oxide layer containing silicate exhibited two times higher corrosion resistance.",

keywords = "Aluminum, Intermetallics, Oxidation, Passive films, Polarization, SEM",

author = "Din, {Rameez Ud} and Kirill Bordo and Naja Tabrizian and Jellesen, {Morten Stendahl} and Rajan Ambat",

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doi = "10.1016/j.apsusc.2017.06.153",

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journal = "Applied Surface Science",

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T1 - Steam based conversion coating on AA6060 alloy: Effect of sodium silicate chemistry and corrosion performance

AU - Din, Rameez Ud

AU - Bordo, Kirill

AU - Tabrizian, Naja

AU - Jellesen, Morten Stendahl

AU - Ambat, Rajan

PY - 2017

Y1 - 2017

N2 - Surface treatment of aluminium alloy AA6060 using an industrially applicable pilot steam jet system with and without silicate chemistry has been investigated. Treatment using steam alone and steam with silicate, resulted in an oxide layer formation with thickness ∼425 nm and ∼160 nm, respectively. Moreover, the use of sodium silicate resulted in the formation of distinct microstructure and incorporation of silicate into the oxide film. These oxide films reduced the anodic activity 4 times, while the corrosion protection by silicate containing oxide was the function of its concentration. Further, in acid salt spray and filiform corrosion tests, oxide layer containing silicate exhibited two times higher corrosion resistance.

AB - Surface treatment of aluminium alloy AA6060 using an industrially applicable pilot steam jet system with and without silicate chemistry has been investigated. Treatment using steam alone and steam with silicate, resulted in an oxide layer formation with thickness ∼425 nm and ∼160 nm, respectively. Moreover, the use of sodium silicate resulted in the formation of distinct microstructure and incorporation of silicate into the oxide film. These oxide films reduced the anodic activity 4 times, while the corrosion protection by silicate containing oxide was the function of its concentration. Further, in acid salt spray and filiform corrosion tests, oxide layer containing silicate exhibited two times higher corrosion resistance.

KW - Aluminum

KW - Intermetallics

KW - Oxidation

KW - Passive films

KW - Polarization

KW - SEM

U2 - 10.1016/j.apsusc.2017.06.153

DO - 10.1016/j.apsusc.2017.06.153

M3 - Journal article

VL - 423

SP - 78

EP - 89

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -

Steam based conversion coating on AA6060 alloy: Effect of sodium silicate chemistry and corrosion performance

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Keywords

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