Galvanic Corrosion Behaviour of Phosphate Nodular Cast Iron in Different Types of Residual Waters and Couplings

Nejneru, Carmen; Perju, Manuela Cristina; Burduhos-Nergis, Dumitru Doru; Sandu, Andrei Victor; Bejinariu, Costică

doi:10.37358/rc.19.10.7604

Cited by 5 publications

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“…Both the molybdenum bisulfate-based oil and the paint used in this study were purchased from the market. The elastomers-based paint is a product used for car paint, which protects against external factors, such as impact with stones or other objects, due to the elasticity it possesses [19][20][21].…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing

et al. 2020

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This study aims to evaluate the corrosion resistance of carbon steel, used for carabiners manufacturing, coated with three different types of phosphate layer. The phosphate layers have been obtained by phosphate conversion coating with three different types of phosphate solutions: zinc-based solution, zinc-iron-based phosphate solution, and manganese-based phosphate solution. Additionally, the test was performed on zinc phosphate samples impregnated with molybdenum bisulfate-based oil and zinc phosphate samples further coated with a layer of elastomer-based paint. Considering the areas where the carabiners are used (civil engineering, navigation, oil industry, rescue operations, etc.), the corrosive environments studied are rainwater, Black Sea water, and fire extinguishing solution. The structure of the deposited layers was studied by scanning electron microscopy, while the interface structure between the alloy and corrosive environment was analyzed by electrochemical impedance spectroscopy. According to this study, the corrosion resistance of zinc-based phosphate coated samples and zinc/iron-based phosphate coated samples is higher than that of the studied carbon steel samples, despite the corrosion environment. Also, the most aggressive corrosion environment was the fire extinguishing solution.

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Section: Methodsmentioning

confidence: 99%

Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing

et al. 2020

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“…The implementation of the assessment technique validates that the technical functions' requirements are met while keeping the operational indicators' values within the prescribed limitations [19][20][21][22][23].…”

Section: Resultsmentioning

confidence: 97%

Study on behaviour of electrical insulating materials combined with conductive elements

Buica

Antonov

Beiu

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The study presents the research results on the identification of technical and safety requirements specific to work equipment made of electrical insulation materials combined with conductive elements, to guarantee safety in use. The identification of the technical and safety requirements specific to the work equipment that is provided with electrically insulating materials combined with conductive elements was carried out, taking into account the safety conditions that must be guaranteed from the design and manufacturing phase. The national technical norms for live work stipulate that the work equipment used for electrical installations must be certified from the point of view of safety and health at work. Research study shows the behavior of various electrical insulation materials combined with conductive elements under the influence of mechanical, electrical, thermal and environmental factors to verify and certify the safety function that must be guaranteed in use. The research results consist of the development of the experimentation and evaluation methodology concerning the legal regulations in force and the evaluation of compliance with the technical and safety requirements identified for work equipment that is provided with electrical insulation materials combined with conductive elements - occupational health of workers and a safe work environment.

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“…When an iron-based alloy corrodes in an electrolytic medium, two processes take place simultaneously: the dissolution of iron at the anode and a reduction process at the cathode. In an alkaline or neutral medium at the cathode, there is a reduction of dissolved oxygen from the solution, while in an acid medium there is a reduction of hydrogen ions [23].…”

Section: Methodsmentioning

confidence: 99%

Galvanic Corrosion Behaviour of Different Types of Coatings Used in Safety Systems Manufacturing

Burduhos-Nergis

Bejinariu

2021

Coatings

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Worker safety is one of the main aspects to be taken into account in any activity carried out at work. When we talk about the safety of the worker at activities carried out at height, the condition and characteristics of the personal protective equipment against falling from a height are one of the main causes of work accidents resulting in serious injuries or death. Carabiners are the main components of the safety system; their role is to connect the other components of the system or to make the connection between the system and the anchor point. Therefore, to be used safely, the carabiners’ material must have high corrosion resistance in different environments. This paper is part of a complex study that aims to improve the corrosion properties of carbon steel used in the manufacture of carabiners. Previous studies have shown that the corrosion resistance of carbon steel in various corrosive environments has been improved by the deposition of different types of phosphate layers, as well as other subsequently deposited layers. The aim of this paper is to study the galvanic corrosion evaluation between different galvanic couples (duralumin-coated samples, aluminium bronze-coated samples, and carbon steel-coated samples) tested in three different corrosive media. Moreover, the study approaches for the first time the galvanic corrosion of systems that can be formed between the materials used in the manufacture of carabiners. Accordingly, it was observed that, overall, the samples coated with a Zn phosphate layer exhibited the best performance in all the corrosive environments (saltwater and fire extinguishing solution).

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Galvanic Corrosion Behaviour of Phosphate Nodular Cast Iron in Different Types of Residual Waters and Couplings

Cited by 5 publications

References 0 publications

Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing

Evaluation of the Corrosion Resistance of Phosphate Coatings Deposited on the Surface of the Carbon Steel Used for Carabiners Manufacturing

Study on behaviour of electrical insulating materials combined with conductive elements

Galvanic Corrosion Behaviour of Different Types of Coatings Used in Safety Systems Manufacturing

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