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Hot dip galvanizing of the steel construction
Pometlo, Stanislav ; Vyplašil, Evžen (referee) ; Kubíček, Jaroslav (advisor)
This master´s thesis deals with hot dip galvanizing of steel constructions and their protection from corrosion. This work describes the origin of corrosion of steel and its corrosion in different areas and presents degreasing and pickling before hot dip galvanization. It describes possibilities of making zinc layer by the wet and draw method of hot dip galvanization. Furthermore, it puts forward reactions between zinc and iron, possible defects of the zinc layer and influence of the hot dip galvanizing on the steel constructions. The experimental part examines the influence of the hydrogen charging on the material and the time of the flux operation on the quality of layer. The work further analyses the changing of mechanical properties of steels Hardox 500 and Weldox 700 as a result of the hydrogen embrittlement during pickling by the hydrochloric acid.
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The technology of hot-dip galvanizing
Pometlo, Stanislav ; Osička, Karel (referee) ; Mouralová, Kateřina (advisor)
This thesis deals with the technology of hot-dip galvanizing. At the beginning of this work views into the history of hot-dip galvanizing and analysis of known technologies about applying of melted zinc into the surface of material. It further describes modification for surface before application of zinc´s coating. In the next part of the work are summarized the most common corrosions of hot-dip galvanized material. The work follows up the difficultness of operation for hot-dip galvanizing device. At the end of work describes cooperation with Alka Holding s. r. o.
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Design of welding jig
Štancl, Jiří ; Kubíček, Jaroslav (referee) ; Daněk, Ladislav (advisor)
The main focus of the thesis is the proposal for the construction of welding jig for the extension of the bus. Welding of individual parts of the assembly is on manual workplace. All parts are made of fabricated structural steel ČSN 41 1373 with galvannealed coating. As an appropriate technology for welding of extension with the optimal parameters method MAG was chosen.
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Information System Design in the Machine Company
Niedoba, Daniel ; Šunka,, Josef (referee) ; Videcká, Zdeňka (advisor)
This diploma work analyses order to cash process in the company which core business lies within steel construction zinc dipping, preparation of technical proposals and providing of services in transportation and manual works. This thesis includes proposals for process optimization with aim to select new IT system which leads to cost reduction and eventually to the enhancement of company’s effectiveness.
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The properties of welding joint after hot-dip galvanizing
Vítek, Pavel ; Suchánková, Ivana (referee) ; Kubíček, Jaroslav (advisor)
The project elaborated in frame of Master's studies branch 2303T002 presents a study of welded joints for hot-dip galvanizing. On the basis of literature study it is assumed that zinc influences the properties of welded joints. Samples were made of high strength steels DOMEX and wear-resistant steels HARDOX which were welded using MAG. Subsequently, half of the samples treated with zinc. The evaluation is used tear test and test Vickers hardness. Finally, the project is the comparison of the measured values of galvanized steel and steel without zinc.
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Hot dip galvanizing of highstrength steels
Baránek, Tomáš ; Žák, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This master’s thesis deals with the properties of highstrength steels, mainly with their resistance to corrosion. It describes discusses different types of corrosion and the possibility of protecting materials against corrosion. The thesis also evaluates compares the cost of corrosion protection by using coating and hot dip galvanizing. It describes describes the principles of degreasing and pickling, which is used as an adjustment before hot dip galvanizing. It evaluates there are many procedures for hot dip galvanizing, such as wet, dry or spin method, which is used for small parts. This thesis also evaluates the change of mechanical properties of steels: Hardox 500, Weldox 700 and 500 Weldox after hot dip galvanizing.
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System of quality control in selected company
OCHRANOVÁ, Iveta
The master's degree thesis deals with the analysis of the quality management system in a selected organisation. The theoretical part focuses on history and quality management, quality principles and its concept. It describes the quality management system, its implementation and documentation. General standards and standards for hot-dip galvanising are an essential part for an easier orientation in the issues. The practical part describes a company engaged in hot-dip galvanising, the company's goals and the process of hot-dip galvanising. The next part provides a detailed description of the technological process concerning hot-dip galvanising to illustrate practically the quality management system. In order to follow the production process, one contract was selected and was closely observed during every step of the whole process of hot-dip galvanising. The last part of the chapter includes data analysis of the quality management system as well as a description of the Pareto analysis, which represents the only instrument of quality management in the organisation. The conclusion provides some improvement suggestions which should be applied by the company to enhance the quality management system and at the same time to prevent possible complications.
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Hot dip galvanizing of the steel construction
Pometlo, Stanislav ; Vyplašil, Evžen (referee) ; Kubíček, Jaroslav (advisor)
This master´s thesis deals with hot dip galvanizing of steel constructions and their protection from corrosion. This work describes the origin of corrosion of steel and its corrosion in different areas and presents degreasing and pickling before hot dip galvanization. It describes possibilities of making zinc layer by the wet and draw method of hot dip galvanization. Furthermore, it puts forward reactions between zinc and iron, possible defects of the zinc layer and influence of the hot dip galvanizing on the steel constructions. The experimental part examines the influence of the hydrogen charging on the material and the time of the flux operation on the quality of layer. The work further analyses the changing of mechanical properties of steels Hardox 500 and Weldox 700 as a result of the hydrogen embrittlement during pickling by the hydrochloric acid.
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