Author
M. Halamova
Bio: M. Halamova is an academic researcher from University of Žilina. The author has contributed to research in topics: Corrosion & Chloride. The author has an hindex of 1, co-authored 1 publications receiving 7 citations.
Topics: Corrosion, Chloride, Shot peening, Austenite
Papers
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TL;DR: In this paper, the effects of various surface treatment techniques such as grinding, garnet blasting, and shot peening on the corrosion rate and behavior of austenite stainless steel of type AISI 316 Ti were investigated using immersion tests and electrochemical impedance spectroscopy together with opticalscanning electron microscopy.
Abstract: The current paper investigates effects of various surface treatment techniques suchas grinding, garnet blasting, and shot peening on the corrosion rate and behaviorof austenite stainless steel of type AISI 316 Ti. The exposure to different corrosivesolutions usually accompanying the coastal and industrial environments (sodiumchloride and ferric chloride), as well as a combination of the two was considered. Thecorrosion behavior of AISI 316 Ti under these test conditions was investigated usingimmersion tests and electrochemical impedance spectroscopy together with opticalscanning electron microscopy, in order to observe and to assess the changes in thesurface configuration and topography such the shapes, distribution, and dimensionsof the resulting pits. The presented results clearly show the relatively higher corrosiveeffect of ferric chloride, and the increased corrosion rate under greater surfaceroughness values, which imply greater real surface area and capillarity effects.
9 citations
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31 Jan 2020
TL;DR: In this paper, an analysis of Impressed CurrentCathodic Protection (ICCP) design of the underwater structure of KRI using computative theory calculation andspecimen test is presented.
Abstract: In carrying out these basic tasks the Navy relies heavily on the readiness of the Indonesian Warship (KRI),including the readiness of underwater construction in KRI from corrosion attack on sea water. Nowadays, KRIuses Sacrificial Anode Cathodic Protection (SACP) from corrosion attack. Whereas, SACP system has someweakness, such as the lifetime protection is short. The aim of this paper is to the analysis of Impressed CurrentCathodic Protection (ICCP) design of the underwater structure of KRI using computative theory calculation andspecimen test. The results of ICCP design showed that the specimens I required 0.081 Ampere (A) forprotection current, specimen 2 required 0.010 A for protection current, specimens 3 required 0.00251 A. Withpotential protection between -800 mV up to -1100 mV, it described that the ICCP system is reasonable. Theresult of cathodic protection design towards an underwater structure of KRI (TR-40 Type) showed that 1.75 forAmpere (A) and 3.35 volt DC for voltage. The benefit of this paper is a reference standard in the planning of theICCP design at KRI.Keywords: Corrosion, Underwater Structure of Warship, Impressed Current Cathodic Protection (ICCP).
5 citations
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TL;DR: The main interest of as mentioned in this paper is to focus on corrosion properties of the AISI 316Ti stainless steel treated by shot peening and pickling and analyze the corrosion behavior of the material in question.
Abstract: Surface conditions of materials affect the chemical, physical and mechanical properties of stainless steels. The main interest of this paper is to focus on corrosion properties of the AISI 316Ti stainless steel treated by shot peening and shot peening and pickling. In the last years shot peening has been widely used as a method improving fatigue properties of components under cyclical load. Because surface finishing has strong effect on corrosion susceptibility of stainless steels, e. g. pitting and created pits can initialize cracks, it is important to analyse corrosion behaviour of the material in question. In this study, the tested surfaces were characterized by SEM, EDX analyses, measurement of surface free energy and roughness. Corrosion properties were investigated in various environments by exposure, potentiodynamic cyclic and EIS tests.
4 citations
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4 citations
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16 Jan 2019TL;DR: In this paper, the use of waste plastic as modifier for aggregates (plastic coating aggregate) was investigated and the test results had demonstrated that there was an improvement in the properties of plastic coated aggregates.
Abstract: Rapid growth of plastics industries in Asia's emerging markets particularly in Malaysia, in one way, it raised expectations for everyday comforts, in the other way it also causes environmental issues. Plastic bottle for recycling can be found from the household waste stream, and most of them are made from Polyethylene Terephthalate (PET). Recycling this plastic into another form might be one of the cheapest and rapid solutions. However, turning this plastic into some other usable form uses energy and this may not become a green waste management solution. In this research, PET is utilized to explore its potential prospects to upgrade asphalt mixture properties. This study investigates the use of waste plastic as modifier for aggregates (plastic coating aggregate). The type of plastic used in this study was waste PET plastic bottle. The shredded waste PET plastic (size 0.075mm to 1.18mm) was mixed with hot aggregate to form a thin layer on the surface of the aggregates. The properties of modified aggregate and unmodified aggregate was tested and compared. 1% and 2% of plastic by weight of aggregate were used to coat the aggregate. The plastic-coated aggregates are tested for impact value and crushing value. The test results had demonstrated that there was an improvement in the properties of plastic coated aggregates.
4 citations