Application of embedded sensors in the thermal cycling of organic coatings

Su, Quan; Allahar, Kerry N.; Bierwagen, Gordon P.

doi:10.1016/j.corsci.2008.06.010

Cited by 20 publications

(7 citation statements)

References 24 publications

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“…The temperature dependence of the impedance of the coatings embedded with different fiber sensors was evaluated by comparing their activation energy. The activation energies were calculated using Equation (1) [ 8 , 32 ] from both Configuration A and B data under the assumption of Arrhenius behavior of the coatings.

where |Z| 0.1 Hz is the impedance of the coating at 0.1 Hz, E a is the activation energy, A is the Arrhenius constant, T is the temperature in Kelvin, and R is the universal gas constant.…”

Section: Resultsmentioning

confidence: 99%

“…Corrosion sensors have been investigated using an embedded electrode or sensor placed in the coating to measure changes in the electrochemical properties [ 2 , 3 , 4 , 5 ]. Researchers have embedded platinum, gold, and nickel sensor layers at the metal–coating interface to measure the real-time electrochemical impedance [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. A major drawback in such a system is the corrosion of the sensing element itself as it is also metallic.…”

Section: Introductionmentioning

confidence: 99%

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Low-Cost Reliable Corrosion Sensors Using ZnO-PVDF Nanocomposite Textiles

Chowdhury

D’Souza

Dahotre

2021

Sensors

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Submerged steel pipes are susceptible to corrosion due to long exposure under harsh corrosive conditions. Here, we investigated the reliability and effectiveness of nonwoven zinc(II) oxide-polyvinylidene fluoride (ZnO-PVDF) nanocomposite fiber textiles as an embedded corrosion sensor. An accelerated thermal cyclic method paired to electrochemical impedance spectroscopy (EIS) was used for this purpose. Sensor accuracy and reliability were determined using the textile and instrument as reference electrodes. The results showed that the coating and the sensor improved the corrosion resistance when ZnO was added to the sensor textile and introduced into the coating. As the coating’s glass transition was approached, the corrosion performance of the coating degraded and the sensor accuracy decreased. The results suggested that the flexible sensor is reliable at both monitoring the corrosion and acting as a corrosion barrier.

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where |Z| 0.1 Hz is the impedance of the coating at 0.1 Hz, E a is the activation energy, A is the Arrhenius constant, T is the temperature in Kelvin, and R is the universal gas constant.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-Cost Reliable Corrosion Sensors Using ZnO-PVDF Nanocomposite Textiles

Chowdhury

D’Souza

Dahotre

2021

Sensors

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“…21 We are currently trying to expand our quantitative understanding of degradation accelerating factors in other studies from this laboratory. 22,23 …”

Section: Discussionmentioning

confidence: 98%

A new acceleration factor for the testing of corrosion protective coatings: flow-induced coating degradation

Wang

Bierwagen

2009

J Coat Technol Res

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For corrosion protective coatings that are designed to give lifetimes of protection that may extend to 50 years, valid accelerated test methods are necessary to develop improved systems and validate performance. Fluid flow over metals has long been believed to influence the corrosion process. Studies have been focused on the effects of flow rate on the corrosion of bare metals. The influence of fluid flow on the degradation of metal-protective coatings has received less attention. This paper describes a preliminary study on the influence of laminar flow on organic coatings. A Hele-Shaw cell and its associated fluid control apparatuses are incorporated into the electrochemical cell setup. The barrier properties of the coating as a function of immersion time and flow rate have been monitored by electrochemical impedance spectroscopy. We observe that the barrier properties of the coating measured electrochemically decrease exponentially with the increasing flow rate. We propose that the flowing electrolyte solution could be used in acceleration tests for the lifetime prediction of organic coatings as the acceleration of failure we have observed does not appear to change the mechanism of failure. Further analysis is proposed to validate immersion flow rate as a universal accelerating parameter for coating failure.

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“…Su et al [34] using EIS monitoring and embedded sensor showed that the resistance of both coating and coating/metal interface decrease with temperature, and the corrosion processes increase due to the loss of coating barrier properties.…”

Section: Salt Spray Testmentioning

confidence: 99%

Experimental evaluation of high solid polyurethane coating in the presence of salt at high temperature

Rezaei

Sharif

Sarabi

et al. 2010

Materials & Corrosion

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Ions' presence and high temperature affect the performance and service life of all types of coatings including pipeline coatings. Pipeline coatings are relatively thick and their evaluations are very time consuming. In this study, experiments on the thick coating samples (roughly 250 and 400 mm) of high solid polyurethane (HSPU) have been conducted to evaluate the effect of high temperature and presence of ions in the media, on the performance of coatings. The experiments were performed in two types of electrolytes, sodium chloride solution (3.5 wt% fraction) and distilled water, at two temperature levels of 25 and 75 8C, respectively. The coating performance was studied using electrochemical spectroscopy impedance (EIS) method. The results of experiments show that the presence of ions reduces the service life of the coating and higher temperature accelerates the degradation process further if oxygen is not limited.

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Application of embedded sensors in the thermal cycling of organic coatings

Cited by 20 publications

References 24 publications

Low-Cost Reliable Corrosion Sensors Using ZnO-PVDF Nanocomposite Textiles

Low-Cost Reliable Corrosion Sensors Using ZnO-PVDF Nanocomposite Textiles

A new acceleration factor for the testing of corrosion protective coatings: flow-induced coating degradation

Experimental evaluation of high solid polyurethane coating in the presence of salt at high temperature

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