2005
DOI: 10.1590/s0103-50532005000100015
|View full text |Cite
|
Sign up to set email alerts
|

The study of corrosion stability of organic epoxy protective coatings on aluminium and modified aluminium surfaces

Abstract: Revestimentos de epóxido foram obtidos através da eletrodeposição catódica de uma resina epóxi sobre alumínio e superfícies de alumínio modificadas (fosfatadas, cromadas-fosfatadas e anodizadas) usando o método potenciostático (concentração da resina de 10% em massa, temperatura de 27 °C e tensão de 250 V). A corrosão desses revestimentos foi investigada durante exposição ao NaCl 3% usando espectroscopia de impedância eletroquímica (EIS) e medidas de polarização. A partir da medida da dependência da resistênci… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
4
0

Year Published

2009
2009
2019
2019

Publication Types

Select...
7
1

Relationship

0
8

Authors

Journals

citations
Cited by 8 publications
(4 citation statements)
references
References 17 publications
0
4
0
Order By: Relevance
“…During exposure to a corrosive agent, electrolyte activates conductive 'tracks' in organic coatings that may lead the electrolyte to the coating/metal interface; there, anodic dissolution of metal will take place. 41 Hence, in the case of a steel substrate, a likely anodic reaction would be the oxidation of Fe in discontinuities of the passive film. However, Fig.…”
Section: Anodic Polarisationmentioning
confidence: 99%
“…During exposure to a corrosive agent, electrolyte activates conductive 'tracks' in organic coatings that may lead the electrolyte to the coating/metal interface; there, anodic dissolution of metal will take place. 41 Hence, in the case of a steel substrate, a likely anodic reaction would be the oxidation of Fe in discontinuities of the passive film. However, Fig.…”
Section: Anodic Polarisationmentioning
confidence: 99%
“…The CO 2 -containing beverages such as beer and carbonated drinks have acidity and chlorides in the composition and, when packed in Al cans, can promote the corrosion process by coming into contact with the Al material. To mitigate this problem, commercial Al cans are internally spray coated by synthetic resins, generally natural or synthetic epoxy, that aims to protect the Al surface from direct contact with the beverage [ 4 , 5 , 6 ]. However, when the resin is not applied correctly or when the Al can undergoes mechanical impact or elevated temperatures, the occurrence of localized corrosion is verified due to the presence of pinholes, cracks or grains boundaries in the coatings [ 7 ].…”
Section: Introductionmentioning
confidence: 99%
“…This leads to the beginning of electrochemical process on the metallic interface as a consequence of the loss of coating. Higher values of R t and lower values of C c and C dl for the epoxy coatings with 10% and 20% PVC's indicated greater corrosion stability due to the existence of passive anodic oxide layer [48,49]. The C dl is a measure of an area from which the coatings have been disbanded and can be measured only at a very advanced stage of deterioration.…”
Section: Eis Measurementmentioning
confidence: 99%