Corrosion Fatigue Crack Growth Studies on Pressure Vessel and Piping Steels in Water Environment

Mathew, N. M.; Vishnuvardhan, S.; Raghava, G.; Santhi, A. S.

doi:10.1515/amm-2017-0281

Cited by 3 publications

(2 citation statements)

References 3 publications

(3 reference statements)

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“…Hydrostatic pressure testing, also known as 'Hydrostatic Testing' or a 'Leak Test', provides a method for finding leaks or verifying performance and durability in pressure vessels.This test is carried out by filling (pressurizing) the vessel with water and the water pressure is increased, held for a certain duration, and then released [7]. As the test medium is a corrosive one the corrosion phenomenon occurs in various form [8][9][10][11][12][13][14][15][16]. The most critical situation is recorded after the hydraulic test, when corrosion occurs in a very short time even before the protection recommended by the designer and especially when the vessels are stored until delivery to the customer.…”

Section: Introductionmentioning

confidence: 99%

Increasing Corrosion Resistance of Pressure Vessels at the Hydrostatic Pressure Testing by Using Inhibitors

Iordoc¹,

Marin²,

Stoianovici³

et al. 2021

Rev. Chim.

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Studies of the corrosion initiation at the pressure hydraulic test of pressure vessels during their filling, maintaining and draining are presented. It has been established that the most suitable method involves the use of corrosion inhibitors, which directly decrease the corrosion rate even in small or very small quantities. It was studied the influence of some corrosion inhibitors at different concentrations on some steel materials commonly used at pressure vessels manufacturing. The study involved the inhibitors testing both in laboratory and in factory conditions. Testing in laboratory conditions involved the analysis of the following inhibitors: urea, thiourea, triethanolamine, FINEAMIN 88 and FINEAMIN 06. The results were compared with those of the Adirol inhibitor, the currently used inhibitor. It was investigated the corrosion of the following stainless steels and unalloyed steels: A 240 grade 304, A 240 grade 316, A 516 grade 70, A 516 grade 60, P260-GH, P265, P275, P295-GH, P295, and P355. By recording the potentiodynamic polarization curves, the corrosion parameters (corrosion potential, corrosion current density, polarization resistance, corrosion rate, charge transfer coefficients for anodic and cathodic processes, inhibitors acting coefficients, and inhibition efficiencies) have been evaluated. The following corrosion inhibitor solutions were selected for testing under the factory specific conditions: Instal Protect SP at concentrations of 5%, 7.5% and 10%, ELG INCOR SP at 10% concentration, FINEAMIN 06 at 10/00 concentration and a mixture of 40mL FINEAMIN 06 + 40 mL FINEAMIN 88 SCAV25 in 40 L water. The analysed steels were A 106 grade B and A 283 grade C. Tests in laboratory conditions revealed a different behaviour of the inhibitors, depending on the analysed concentration and steel grade. The inhibitors proven as appropriate following the tests in the factory conditions were ELG INCOR SP used in industrial water (tap water), whereas the mixture of FINEAMIN 06 + FINEAMIN 88 SCAV25 had efficiency only in demineralised water.

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Section: Introductionmentioning

confidence: 99%

Increasing Corrosion Resistance of Pressure Vessels at the Hydrostatic Pressure Testing by Using Inhibitors

Iordoc¹,

Marin²,

Stoianovici³

et al. 2021

Rev. Chim.

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show abstract

“…Non-destructive testing must be supported by the results of destructive tests under realreflective conditions. An example is the study of corrosion fatigue, crack growth studies and environmental degradation of joints [10,11].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Monitoring of Aircraft Based on the Corrosion Prognostic Health Management (CPHM) System

Ciężak¹,

Rdzanek²

2020

Journal of KONBiN

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The article presents methods to monitor the actual state of aircraft’s airframe, in particular, the onset of corrosion. The greatest emphasis is put on the “Corrosion Prognostic Health Management” CPHM system. Authors discuss corrosion detection using NDT methods as well as the possibilities of forecasting methods for estimating the onset of corrosion basing on the data gathered by means corrosion sensors. Based on the results of the previous research and analyses, authors focus on monitoring the internal microclimate and the factors causing corrosion in the aspect of damage tolerance operation of the aircraft. The results of the preliminary studies giving credibility to the concepts of predicting corrosion onset in the aircraft structure are presented. Preliminary results of tests carried out in supervised flights are also presented. The final part of the article presents the concept of modernizing the corrosion field site in order to use it in hermetic and non-hermetic tests of aircraft spaces.

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Fatigue Crack Growth Studies on Power Plant Piping Materials under Corrosive Environment

Vishnuvardhan

Saravanan

Gandhi

et al. 2019

Procedia Structural Integrity

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Corrosion Fatigue Crack Growth Studies on Pressure Vessel and Piping Steels in Water Environment

Cited by 3 publications

References 3 publications

Increasing Corrosion Resistance of Pressure Vessels at the Hydrostatic Pressure Testing by Using Inhibitors

Increasing Corrosion Resistance of Pressure Vessels at the Hydrostatic Pressure Testing by Using Inhibitors

Corrosion Monitoring of Aircraft Based on the Corrosion Prognostic Health Management (CPHM) System

Fatigue Crack Growth Studies on Power Plant Piping Materials under Corrosive Environment

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