Marine Corrosion and Cathodic Protection

Googan, Chris

doi:10.1201/9781003216070

Cited by 7 publications

(9 citation statements)

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“…(2) The model generates a random population of solutions. (3) The model tests all the plausible solutions and ranks them according to the error. ( 4) The solution with the highest error "dies" and is replaced by a new random vector of solutions.…”

Section: Software Methodsmentioning

confidence: 99%

“…Pitting corrosion has a mechanism with four stages: processes that occur at the products-electrolyte interface, vacancy movement inside the passive film, generation of metastable pits, and stable pit growth. These stages depend on the chemical composition and structure of the oxide film [3].…”

Section: Introductionmentioning

confidence: 99%

“…In Al-Zn alloys, Zn is usually precipitated at grain boundaries or interdendritic regions [9]. Polarization tests on these alloys promote galvanic and pitting due to the local composition variation, which, in turn, induces a diminution of the anode efficiency [3]. Valdés et al [10] developed three Al-based alloys with Zn (4.1-7.77 at.%), Mg (5.84-10.67 at.%), and Li (0.12-0.15 at.%).…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Behavior of Al Modified with Zn in Chloride Solution

Porcayo-Calderón

Barragán²,

Barraza-Fierro

et al. 2022

Materials

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Aluminum-based alloys have been considered candidate materials for cathodic protection anodes. However, the Al-based alloys can form a layer of alumina, which is a drawback in a sacrificial anode. The anodes must exhibit uniform corrosion to achieve better performance. Aluminum can be alloyed with Zn to improve their performance. In this sense, in the present research, the electrochemical corrosion performance of Al-xZn alloys (x = 1.5, 3.5, and 5 at.% Zn) exposed to 3.5 wt.% NaCl for 24 h was evaluated. Polarization curves, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) were used to identify the electrochemical behavior. The microstructure of the samples before the corrosion assessment was characterized by means of X-ray diffraction analyses (XRD) and scanning electron microscopy (SEM). In addition, microstructures of the corroded surfaces were characterized using X-ray mappings via SEM. Polarization curves indicated that Zn additions changed the pseudo-passivation behavior from what pure Al exhibited in a uniform dissolution regime. Furthermore, the addition of Zn shifted the corrosion potential to the active side and increased the corrosion rate. This behavior was consistent with the proportional decrease in polarization resistance (Rp) and charge transfer resistance (Rct) in the EIS. The analysis of EIS was done using a mathematical model related to an adsorption electrochemical mechanism. The adsorption of chloride at the Al-Zn alloy surface formed aluminum chloride intermediates, which controlled the rate of the process. The rate constants of the reactions of a proposed chemical mechanism were evaluated.

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Section: Software Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Corrosion Behavior of Al Modified with Zn in Chloride Solution

Porcayo-Calderón

Barragán²,

Barraza-Fierro

et al. 2022

Materials

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“…Cathodic protection . Cathodic protection (CP) has been widely used in marine engineering, shipbuilding, and other fields, which can significantly extend the service life of metal materials and inhibit the occurrence of MIC [ 94 , 95 , 96 ]. Some studies have investigated the effectiveness of CP in suppressing MIC [ 94 , 95 , 96 ].…”

Section: Marine Mic Inhibitionmentioning

confidence: 99%

“…Cathodic protection (CP) has been widely used in marine engineering, shipbuilding, and other fields, which can significantly extend the service life of metal materials and inhibit the occurrence of MIC [ 94 , 95 , 96 ]. Some studies have investigated the effectiveness of CP in suppressing MIC [ 94 , 95 , 96 ]. Cathodic protection is an electrochemical method used to safeguard metal structures against corrosion by applying an external current [ 97 , 98 ].…”

Section: Marine Mic Inhibitionmentioning

confidence: 99%

Microbially Influenced Corrosion of Steel in Marine Environments: A Review from Mechanisms to Prevention

Liu,

Zhang,

Fan

et al. 2023

Microorganisms

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Microbially influenced corrosion (MIC) is a formidable challenge in the marine industry, resulting from intricate interactions among various biochemical reactions and microbial species. Many preventions used to mitigate biocorrosion fail due to ignorance of the MIC mechanisms. This review provides a summary of the current research on microbial corrosion in marine environments, including corrosive microbes and biocorrosion mechanisms. We also summarized current strategies for inhibiting MIC and proposed future research directions for MIC mechanisms and prevention. This review aims to comprehensively understand marine microbial corrosion and contribute to novel strategy developments for biocorrosion control in marine environments.

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