steel pipelines are susceptible to corrosion by the action of corrosive substance in the environment and one of the most common failure modes in buried pipeline coatingis cathodic disbondment. consequently, electrochemical impedance spectroscopy (eis) was used to assess the effect of three important parameters, the thickness of coating, the artificial defect and electrolyte type, on cathodic di...

Steel pipelines are susceptible to corrosion by the action of corrosive substance in the environment and one of the most common failure modes in buried pipeline coatingis cathodic disbondment. Consequently, Electrochemical Impedance Spectroscopy (EIS) was used to assess the effect of three important parameters, the thickness of coating, the artificial defect ...

A study was undertaken using electrochemical impedance spectroscopy to measure delamination and compare that measurement, which can be performed on the sample repeatedly, with the accepted method of cathodic disbondment (CD) testing, the major drawback of which is that this measurement can only be done once on the sample; in reaching this goal, EIS could be used to predict delamination based on...

In-situ scanning Kelvin probe (SKP) measurements are used to investigate the relative contributions of in-coating zinc (II) cations and phosphate anions inhibition corrosion-driven cathodic disbondment by (ZnPhos) pigments. Using hot-dip galvanized steel (HDG) substrates, delamination rates model polyvinylbutyral (PVB) coatings comprising different pigment volume fractions (?) phosphate-loaded ...

The role of smart-release corrosion inhibitive pigments in preventing cathodic delamination organically coated hot-dip galvanized steel (HDG) is investigated. consisted hydrotalcite (HT) exchanged with a range inorganic and organic anionic species were dispersed model PVB coating. A scanning Kelvin probe (SKP) technique was used to determine rates, the inhibition efficiencies obtained for ions ...

Metallic structures in service seawater are protected by coupling cathodic protection and paints, where the former may induce disbondment of latter. A preliminary evaluation risk can be made tests (CDTs). Many CDTs use potentials as large E < −1400 mV versus saturated calomel electrode (SCE) applied up to 90 days. Only two CDT protocols require contemporary anode isolation, current pH monitorin...

Abstract Corrosion management in some remote locations such as Niger Delta region of Nigeria, is at risk uncertainty constant power supply. Thus, solar photovoltaic (PV) presents a sustainable alternative to conventional fossil energy mitigating pipeline failure, associated human and material harzards other environmental exposures. Coating defects takes place when the surface structure cathodic...