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Lecturer(s)
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Kalenda Petr, prof. Ing. CSc.
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Veselý David, doc. Ing. Ph.D.
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Kalendová Andréa, prof. Ing. Dr.
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Course content
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Coating compositions resistance evaluation, accelerated corrosion tests. Assessment of coating compositions resistance in SO2-content atmospheres, resistance to salt vapour and condensed moisture resistance. Coating compositions ageing and exposure to ultraviolet radiation, variations in temperatures, cyclic corrosion tests. Determination of coating compositions resistance to liquids, coating compositions chemical resistance. Resistance to special corrosion exposures. Filiform corrosion testing on steel and aluminium, flash corrosion. Indirect corrosion tests. Steel corrosion loss assessment, electrochemical measurement. Coat degradation assessment. Evaluation of intensity, number and size of general defects, vesication levels, general corrosion, leafing levels, fine cracks. Coating compositions formulation and preparation principles. Selection of mixing devices and number of revolutions, low-binding dispersion, dispersion process stages, preparation of coating compositions in dissolver and attritor. Coating compositions preparation principles. Pigment paste preparation, choice of wetting and dispersant additives for organic and inorganic pigments, pigment paste stability, pigment particles flocculation removal. Preparation of model coating compositions. Issues of sedimentation and sediment deposition of powder filling agents, rheologic additives for solvent-borne and water-borne coating compositions choice, reduction of skin creation for coating compositions drying by way of oxidation. Water-borne dispersive coating composition issues, flash-corrosion additives choice. Water-borne dispersive coating compositions issues. Coalescence of particles and correct choice of coalescent, flash corrosion of water-borne coating compositions. Coating compositions and special additives preparation. Agents for improvement of coating compositions spreading, choice of additives against pigments elutriation, coating adherence in galvanized surfaces improvement, affection of drying velocity - siccatives for alkyd coating compositions. Special additives for coating compositions. Ways of coating compositions hardness advances, delustering agents, coating compositions stability, additives for spreading improvement, water-repellents. Various types of coating compositions preparation issues. Coating compositions qualities optimization, whiteness and obscuring power improvement, anti-corrosion qualities improvement.
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Learning activities and teaching methods
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Laboratory work
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Learning outcomes
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Subject is drawn-up as advanced lab of coating compositions and organic coatings branch. Study of anti-corrosion pigments effect, organic inhibitors, inorganic filling agents and specific efficiency of various additives and auxiliary agents for coating compositions is realized in a well-arranged and detailed way. Laboratory technique for coating compositions, organic coatings, powder materials and polymer binding agents preparation and testing is used for laboratory work. The student elaborates individually assigned topic in a seminar paper. The aim of the subject is to improve qualification and skills associated with preparation and evaluation of organic coatings.
Student will be able to prepare a wide range of various organic coatings. Also he/she will be able to precisely evaluate their mechanical and anticorrosive properties.
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Prerequisites
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Basic knowledge of inorganic, organic and macromolecular chemistry. Basic skill in chemical laboratory.
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Assessment methods and criteria
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Oral examination, Written examination, Home assignment evaluation
There is an oral examination. Primary form of exam is the debate about selected themes. Level of acquired knowledge, conceptions and application acquirements is examined. Knowledge is examined by test during semester and its result is included into total classification.
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Recommended literature
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ČERNÝ, M. + kol. Korozní vlastnosti kovových konstrukčních materiálů. SNTL Praha, 1984.
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Koleske V. Paint and Coating Testing Manual. Philadelphia, 1995.
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Mleziva J., Kálal J. Základy makromolekulární chemie. SNTL Praha, 1986. ISBN 04-621-86.
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Patton T.C. Pigment Handbook. New York, 1988.
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Svoboda M. Úvod do ochrany kovů proti korozi pomocí nátěrů. Pardubice, 1978.
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