<abstract xmlns="http://www.w3.org/1999/xhtml">Mixed oxide-based pigments Mg–Zn–Fe with different particle morphologies were prepared by high-temperature solid phase reactions. The core shell pigments containing ferric oxide and non-isometric particles of layered silicates were also prepared. The pigments were tested in paints, the pigment volume concentrations in the modified alkyd resin based binder being 5%, 10%, and 15%. The paint properties were examined by accelerated corrosion tests and by physico-mechanical tests. The effect of the pigment particle morphology on the surface hardness of the paint films was also studied. The influence of pigment volume concentration on the coating properties, and the optimum concentrations providing the most efficient anticorrosive protection were processed. A higher anticorrosion efficiency was observed for the paints with pigments possessing the lamellar particle shape.</abstract>

Anticorrosive efficiency of alkyd resin-based coatings containing Mg–Zn–Fe mixed oxide-based pigments

<abstract xmlns="http://www.w3.org/1999/xhtml">This work is focused on the initial realization of a multi-component coating deposition from the aqueous solution. The Coating composed of the elements Co-Cr-Fe-Mn-Ni was prepared by electroplating process. The chosen substrate was copper. The purpose of the work was to apply the high entropy alloy, which is defined as alloy with structure of a solid solution containing five or more elements in an approximately equal atomic ratio. The use of electrodeposition in this area is rare. The conditions of the plating process, the percentage of the metal ions and cohesion of the layers were studied. The morphology of the excluded coatings was monitored by scanning electron microscopy and their elemental composition was verified by the EDS analysis. The wear resistant features were examined approximately before and consequently also after the thermal resistance testing.</abstract>

Electrodeposition of multicomponent Co–Cr–Fe–Mn–Ni alloy

<abstract xmlns="http://www.w3.org/1999/xhtml">A number of damage functions or dose-response equation, which are compared to the atmospheric corrosion of metals with environmental parameters, have been determined in field programs ISOCORRAG, UN ECE ICP Materials Exposure Programme and Multi-Assess. The all of these dose-response equations are derived on field exposure results performed during period 1986-1995 where the SO2 level was relative high at urban and very high at industrial test sites. Several exposure programmes, national and international, of structural metals’ atmospheric corrosion were conducted since the 1970s on Czech atmospheric test sites including on-site measurement of environmental data. All data from these exposure programs were compared with prediction models.</abstract>

Atmospheric corrosion models

<abstract xmlns="http://www.w3.org/1999/xhtml">The paper summarizes the impact of produced hydrogen and calcium hydroxyzincate (Ca[Zn(OH)3]2·2H2O) on the formation of the porous structure of cement paste in the vicinity of hot-dip galvanized steel. These substances result from cathodic (hydrogen) and anodic (zincates-formed by reaction with hydroxides) corrosion reactions of hot-dip galvanized steel (or pure zinc) in the cement paste.The cement binder pore structure was studied by means of mercury porosimetry and analysis of scanning electron microscopy and confocal microscopy images. The porosity of the cement paste at the galvanized steel / cement interphase increased as a result of galvanized steel corrosion while hydrogen was formed. Such a porous structure was maintained throughout the maturation of cement paste. Kinetics of galvanized steel corrosion related primarily to water transport through the binder. The formation of calcium zincate did not result in transition of galvanized steel from active to passive state corrosion.</abstract>

VŠCHT Praha – Ústav anorganické technologie

VŠCHT Praha – Ústav kovových materiálů a korozního inženýrství

The impact of produced hydrogen gas and calcium zincate on changes of porous structure of cement paste in the vicinity of hot-dip galvanized steel

<abstract xmlns="http://www.w3.org/1999/xhtml">The surface treatment by a powder coating is one of the progressive technologies. Such coatings are resistant to corrosion and mechanical wearing. The quality of surface protection is affected primarily by a layer pre-treatment, the type of surface tretment, the system selection and the method and quality of application. Taking into account all the surface pre-tretment methods, the chemical pre-modification is a leading method. One of the methods is pre-treatment using a conversion coating which was developed on the nanotechnology basis - BONDRITE NT. That non-phosphate chemical pre-treatment is utilized at a surrounding temperature. It creates nano-ceramic protective layer on steel, zinc and aluminium surfaces, and as the result the coating has a significant adhesion. In the paper, the possibilities for the improvement of corrosion resistance of powder coatings using the subject conversion coating are presented at the current pasivation of respective surface.</abstract>

Evaluation of corrosion resistance of powder coatings after various surface chemical pre-treatment

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The journal is primarily focused on corrosion engineering and surface treatment of metallic materials. We accept also articles concerning degradation of paints, enamels and other non-metallic materials used for corrosion prevention of metals. Another field of interest is conservation and restoration of cultural heritage. In this case we accept contributions concerning all materials (metals, wood, paper, leather, textiles, stone, glass and ceramics).  Why subscribe and read   Official Journal of the Association of Czech and Slovak Corrosion Engineers, premier source of high quality research results from all over the world with special emphasis on Central and Eastern Europe;  over 55 years of experience in publishing original papers dealing with corrosion science, engineering and technology;  focused on research in corrosion and surface treatment as well as experiences in practice and „case studies“;  original papers that advance understanding of both the fundamentals of corrosion and its application;  excellent articles authored by researchers from all over the world, who appreciate our fast, fair and constructive peer review provided by experts in the field of corrosion engineering.   Why submit   Fast, fair and constructive peer review  Fast publication process („submission→published article“ takes usually 3-6 months)  High quality electronic publication technologies  Open access (simple and charge-free access for every researcher)   Rejection Rate   10%   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 