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Showing 1 to 20 of 28 for “"Cathodic Protection"”.
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CATHODIC PROTECTION OF REINFORCEMENT BARS IN CONCRETE
… involved investigation of various aspects of cathodic protection in corrosion prevention of the steel reinforcement in concrete. The performance evaluation of cathodic protection, a very important aspect in its operation was widely dealt with. Various criteria used in the cathodic protection …
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Preventing Stern Tube Corrosion through Shipboard Cathodic Protection
Cathodic protection extends the life of ships and decreases the cost of maintaining a ship fleet. Ships built with less noble metals, like steel, will corrode alarmingly and require protection. This work aims explicitly to present an analysis of the cathodic protection of a stern tube, a complex …
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Using cathodic protection to control corrosion of reinforced concrete structures
Cathodic protection (CP) has been increasingly used on reinforced concrete structures to protect steel reinforcement from corrosion. However, due to the complexity of environmental conditions, the specifications in national and international standards are still open to discussion in engineering …
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Corrosion and cathodic protection of iron in differential temperature cells
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Chemical Engineering, 1950.
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Mechanical and cathodic protection aspects of multi-barrier tuff repository canister designs
… and a sacrificial anode was designed to cathodically protect the waste package for a period of 10,000 years. The sacrificial anode is to be made of magnesium. Langelier and Larson's Indices were calculated and speciation calculations of J-13 water was carried out with the help of a …
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Numerical modelling and underlying electrochemical mechanism characterisation of cathodic protection for chloride contaminated reinforced concrete structures
Cathodic Protection (CP) as an effective electrochemical repair technique has been widely employed in the rehabilitation of deterioratedReinforced Concrete (RC) structures worldwide. However, the quantitative specifications of CP technology for RC structures in national and international standards …
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ΠΡΟΣΤΑΣΙΑ ΧΑΛΥΒΑ ΑΠΟ ΔΙΑΒΡΩΣΗ
… THE MODEL OF WAGNER (GALVANIC ELEMENT). FOR THE PROTECTION OF STEEL FROM CORROSION, ANTICORROSIVE PAINTS CONTAINING PIGMENTS WITH H- SEMICONDUCTIVE PROPERTIES HAVE BEEN USED FOR THE FIRST TIME, AND THUS HAVE DEVELOPED A NEW LINE OF ANTI-CORROSIVE PAINTS. THIS HAS IMPORVED THE ANTICORROSIVE …
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Predicting corrosion on protected buried steel natural gas distribution pipelines
PG&E uses cathodic protection, which connects the pipeline to sacrificial anodes that corrode instead of the pipeline, to prevent corrosion on its buried steel natural gas pipelines. However, corrosion leaks still occur. This thesis focuses on whether corrosion leaks can be predicted on steel …
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Combating Corrosion and Monitoring Microgrids on Coast Guard Patrol Boats
… Cutters (FRCs). This thesis investigates hybrid cathodic protection strategies combining impressed current cathodic protection (ICCP) systems and sacrificial zinc anodes to combat corrosion on such vessels. Observing over 550 cumulative months of ICCP system data across 46 FRCs, this thesis …
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Evaluation of corrosion behaviour of hot dip Zn and Zn-Al alloy coatings on steel wire using laboratory and field tests
… lifespan of steel by providing barrier and cathodic corrosion protection. Zinc (Zn) and zinc-aluminium (Zn-Al) alloys are the most commonly used metallic coatings on steel wire. Zn-Al coatings outperform Zn coatings, most notably in marine environments, as they combine the highly insulating …
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Ensaios e metodologias de análise de integridade para equipamentos em aço baixa liga sujeitos à fragilização por hidrogênio
… AISI 4340 low alloy steel in brine solution with cathodic protection. Results obtained were discussed vis à vis available literature, showing good correlation. They were then employed in a structural integrity analysis according to fitness for service standard British Standard 7910 (2013), proving …
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Stress corrosion cracking and hydrogen embrittlement of thick section high strength low alloy steel
… the environmental conditions of free corrosion, cathodic protection and hydrogen generation. The results from this investigation indicated that HSLA 80 base metal and weldments were susceptible to hydrogen assisted cracking(HAC) in a seawater environment under conditions of continuous plastic …
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Understanding the Corrosion of Low-Voltage Al-Ga Anodes
… an attractive metal for use as an anode in the cathodic protection of steels in seawater due to its low cost and high current capacity. Zinc is often used for its ability to readily corrode, but it has a low current capacity and it operates at very negative voltages, leading to hydrogen …
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Investigation of erosion-corrosion behaviour of pump materials
… two cast irons and the stainless steels but the cathodic protection unravelled the advantages of the martensitic based alloys compared with austenitic based alloys. Sintered and HVOF coatings WC-based cermets of similar chemical composition were studied to elucidate the influence of the …
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Chemically-bonded enamel-coated steel pipelines for corrosion protection and flow efficiency
… environments, in order to improve the corrosion protection and safety of hazardous liquid and natural gas pipelines while reducing pressure loss. Out of five types of enamels and their various mixtures, Tomatec slurry and GP2118 powder were selected for steel pipeline applications. They were …
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Protecting Our Investment: Solving Fast Response Cutter Corrosion
… an interaction in a complex, two-stage galvanic protection system on-board the ship that uses both passive zinc protection and impressed current cathodic protection (ICCP) from an active, feedback-controlled power supply. By using custom measuring instruments and applying them on an in service …
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GFRP reinforced concrete : environmental and movement characteristics
… concrete. Consequently, methods such as cathodic protection, epoxy coatings, concrete additives, etc., have been tried. Unfortunately, non of these methods has totally solved the corrosion problem. The outstanding characteristics of fibre reinforced plastic (FRP) suggest that these …
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Service Life Assessment of Harbor Structures - Case studies of chloride ingress into concrete and sheet piling corrosion rates
… and reached the reinforcement, the passivating protection of the rebars is lost and the corrosion processes starts. When designing new concrete structures in marine environments, the only ways to increase the length of the expected service life of reinforced concrete structures are to either …
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DETERMINATION OF THE SYNERGISM BETWEEN EROSION AND CORROSION IN POTASH-SAND SLURRY CORROSION OF CARBON STEEL
… An additional apparatus was developed to apply cathodic protection to the inside surface of the elbow. The research conditions aimed to mimic those found in the potash industry. Experiments focused on determining the effect of solids concentration, flow velocity, and particle size on the …
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Concrete surface coatings and the influence of substrate moisture condition on bond strength
… strategies. These strategies can range from cathodic protection of the steel reinforcement to increasing concrete cover of the section. The easiest and often most commonly used method, although often not effective when used on its own, is to coat the concrete surface with a decorative or …
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