Study on corrosion protection of organic coatings using electrochemical techniques: developing electrochemical noise method, effective of surface preparation and inhomogeneity of organic coatings
type: CreativeWork
description: This study looks into two important aspects of corrosion protection of steel by organic coatings, steel surface preparation and ionic conduction through the coating, as well as development of the electrochemical noise method as an effective assessment method. Surprising and somehow controversial previous findings at the University of Northampton showed an inverse relationship between the roughness of metal substrate and performance of paint coating. So this study was initially launched to further study the effect of metal surface preparation. Four conventional surface preparation methods including ultra high pressure (UHP) hydroblasting, wet abrasive blasting, acid pickling and emery abrasion were studied and compared to an as received control surface. A particular interest of this work was the high demand for an environmentally friendly surface preparation method, e.g. as afforded by UHP hydroblasting, to replace the traditional wet abrasive blasting method. Results of this study revealed the important role of the innate native oxide film and the deleterious effect of contaminants on the protective performance of organic coating. Also it was shown that a highly active surface and large surface profile can be deleterious if an appropriate interaction between paint and metal is not achieved. Results of this study confirmed the earlier findings and suggested the UHP hydroblasting is a successful, cost effective and environmentally friendly surface preparation method and a modern replacement for wet abrasive blasting method. In addition to the effectiveness of metal surface preparation, the ability of organic coating in preventing ions access to metal plays an equally important role in defining the anti-corrosion performance of a coated metal. Hence the mechanism of ionic conduction through organic coatings and their inhomogeneity which are normally formed in crosslinking systems was extensively studied with the aim of finding the cause of formation of the more permeab…
abstract: This study looks into two important aspects of corrosion protection of steel by organic coatings, steel surface preparation and ionic conduction through the coating, as well as development of the electrochemical noise method as an effective assessment method. Surprising and somehow controversial previous findings at the University of Northampton showed an inverse relationship between the roughness of metal substrate and performance of paint coating. So this study was initially launched to further study the effect of metal surface preparation. Four conventional surface preparation methods including ultra high pressure (UHP) hydroblasting, wet abrasive blasting, acid pickling and emery abrasion were studied and compared to an as received control surface. A particular interest of this work was the high demand for an environmentally friendly surface preparation method, e.g. as afforded by UHP hydroblasting, to replace the traditional wet abrasive blasting method. Results of this study revealed the important role of the innate native oxide film and the deleterious effect of contaminants on the protective performance of organic coating. Also it was shown that a highly active surface and large surface profile can be deleterious if an appropriate interaction between paint and metal is not achieved. Results of this study confirmed the earlier findings and suggested the UHP hydroblasting is a successful, cost effective and environmentally friendly surface preparation method and a modern replacement for wet abrasive blasting method. In addition to the effectiveness of metal surface preparation, the ability of organic coating in preventing ions access to metal plays an equally important role in defining the anti-corrosion performance of a coated metal. Hence the mechanism of ionic conduction through organic coatings and their inhomogeneity which are normally formed in crosslinking systems was extensively studied with the aim of finding the cause of formation of the more permeab…
author: Jamali, Seyed Sina
language: eng
date published: 2013
date modified: 2026-07-24T03:26:46Z
provider: University of Northampton
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Northampton