Characterization of blisters on powder coated aluminium AA5006 architectural profiles

Giorgio Giovanni Battista Zaffaroni*, Visweswara Chakravarthy Gudla, Rameez Ud Din, Rajan Ambat

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Investigation of premature blistering and delamination of coated AA5006 window frames using scanning (SEM) and transmission electron microscopy (TEM), glow discharge optical emission spectroscopy, and X-ray photoelectron spectroscopy (XPS )is presented. SEM of the blisters revealed corrosion of Aluminium and accumulation of corrosion products at the interface of coating and metal. TEM and XPS analysis revealed a thin and non-homogenous hexavalent Cr conversion layer. High number density of intermetallics, and surface defects from metal forming process resulted in a defective conversion coating leading to reduced corrosion protection of aluminium in the presence of water and Cl from atmosphere.

Original languageEnglish
JournalEngineering Failure Analysis
Volume103
Pages (from-to)347-360
ISSN1350-6307
DOIs
Publication statusPublished - 2019

Keywords

  • Aluminium
  • Blistering
  • Corrosion
  • Interface analysis
  • Intermetallics

Cite this

@article{668b69832e6f4323a6e40aaba64e290b,
title = "Characterization of blisters on powder coated aluminium AA5006 architectural profiles",
abstract = "Investigation of premature blistering and delamination of coated AA5006 window frames using scanning (SEM) and transmission electron microscopy (TEM), glow discharge optical emission spectroscopy, and X-ray photoelectron spectroscopy (XPS )is presented. SEM of the blisters revealed corrosion of Aluminium and accumulation of corrosion products at the interface of coating and metal. TEM and XPS analysis revealed a thin and non-homogenous hexavalent Cr conversion layer. High number density of intermetallics, and surface defects from metal forming process resulted in a defective conversion coating leading to reduced corrosion protection of aluminium in the presence of water and Cl from atmosphere.",
keywords = "Aluminium, Blistering, Corrosion, Interface analysis, Intermetallics",
author = "Zaffaroni, {Giorgio Giovanni Battista} and Gudla, {Visweswara Chakravarthy} and {Ud Din}, Rameez and Rajan Ambat",
year = "2019",
doi = "10.1016/j.engfailanal.2019.04.039",
language = "English",
volume = "103",
pages = "347--360",
journal = "Engineering Failure Analysis",
issn = "1350-6307",
publisher = "Pergamon Press",

}

Characterization of blisters on powder coated aluminium AA5006 architectural profiles. / Zaffaroni, Giorgio Giovanni Battista; Gudla, Visweswara Chakravarthy; Ud Din, Rameez; Ambat, Rajan.

In: Engineering Failure Analysis, Vol. 103, 2019, p. 347-360.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Characterization of blisters on powder coated aluminium AA5006 architectural profiles

AU - Zaffaroni, Giorgio Giovanni Battista

AU - Gudla, Visweswara Chakravarthy

AU - Ud Din, Rameez

AU - Ambat, Rajan

PY - 2019

Y1 - 2019

N2 - Investigation of premature blistering and delamination of coated AA5006 window frames using scanning (SEM) and transmission electron microscopy (TEM), glow discharge optical emission spectroscopy, and X-ray photoelectron spectroscopy (XPS )is presented. SEM of the blisters revealed corrosion of Aluminium and accumulation of corrosion products at the interface of coating and metal. TEM and XPS analysis revealed a thin and non-homogenous hexavalent Cr conversion layer. High number density of intermetallics, and surface defects from metal forming process resulted in a defective conversion coating leading to reduced corrosion protection of aluminium in the presence of water and Cl from atmosphere.

AB - Investigation of premature blistering and delamination of coated AA5006 window frames using scanning (SEM) and transmission electron microscopy (TEM), glow discharge optical emission spectroscopy, and X-ray photoelectron spectroscopy (XPS )is presented. SEM of the blisters revealed corrosion of Aluminium and accumulation of corrosion products at the interface of coating and metal. TEM and XPS analysis revealed a thin and non-homogenous hexavalent Cr conversion layer. High number density of intermetallics, and surface defects from metal forming process resulted in a defective conversion coating leading to reduced corrosion protection of aluminium in the presence of water and Cl from atmosphere.

KW - Aluminium

KW - Blistering

KW - Corrosion

KW - Interface analysis

KW - Intermetallics

U2 - 10.1016/j.engfailanal.2019.04.039

DO - 10.1016/j.engfailanal.2019.04.039

M3 - Journal article

VL - 103

SP - 347

EP - 360

JO - Engineering Failure Analysis

JF - Engineering Failure Analysis

SN - 1350-6307

ER -