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„Ochrona przed Korozją” (Corrosion Protection) No 9/2016

View cover and table of contents (in Polish and English) (pdf)

 

DOI: 10.15199/40.2016.9.1

Protective properties of coating systems in natural and laboratory corrosion environments

ZUBIELEWICZ M.

ŚLUSARCZYK A.

KAMIŃSKA-BACH G.

Instytut Inżynierii Materiałów Polimerowych, Oddział Farb i Tworzyw, Gliwice

KRÓLIKOWSKA A.

KOMOROWSKI L.

Instytut Badawczy Dróg i Mostów, Warszawa

The test results of protective properties of anticorrosive coatings systems used for bridge protection are discussed. The research was carried out directly on selected bridges exposed to C4/C5I environmental corrosivity category and in laboratory conditions. Coatings on the bridges were evaluated for chalking, blistering, flacking, cracking, rusting and adhesion. The electrochemical impedance spectroscopy (EIS) was used to test barrier properties. Laboratory tests covered physiomechanical properties (adhesion, hardness, impact resistance), resistance to corrosive environment (salt spray test, changing conditions) and to UV radiation. A high degree of correlation was found between results of the research carried out so far and the real behavior of coatings during long-time operation in natural corrosion environment

C4–C5.

Keywords: corrosion, corrosion protection, coating systems, testing

2016

Vol. 59, nr 9

s. 319-324

Bibliogr. 24

 


 

DOI: 10.15199/40.2016.9.2

Test methods for environmentally friendly corrosion inhibitors for comprehensive protection of water systems

MALISZEWSKA I.

FALEWICZ P.

KLAKOČAR-CIEPACZ M.

Politechnika Wrocławska Wydział Chemiczny /

Wrocław University of Science and Technology, Faculty of Chemistry

The paper presents the results of biological tests performed on newcompounds belonging to the aminophosphonic acid derivatives group,which can form the basis for multifunctional inhibitor preparations for thecomprehensive protection of industrial cooling water systems. Diffusionand serial dilutions methods on a solid medium were used to determinethe effect, of the tested compounds on the growth and developmentof selected micro-organisms. The compounds’ ability to biodegrade in aerobic conditions was designated by measuring oxygen consumption (ultimate biodegradability) and in closed- bottle conditions.

Keywords: corrosion inhibitor, water system, biochemical properties, aminophosphonic acid

 2016

Vol. 59, nr 9

s. 325-329

Bibliogr. 14

 


 

DOI: 10.15199/40.2016.9.3

Effect of surface modification of LaNi4.5Co0.5 active material on electrochemical parameters of hydride electrode in conditions of long-lasting cycling

STEFANIAK A.

BORDOLIŃSKA K.

Politechnika Częstochowska, Wydział Inżynierii Produkcji i Technologii Materiałów, Katedra Chemii

SOZAŃSKA M.

Politechnika Śląska, Wydział Inżynierii Materiałowej i Metalurgii, Instytut Nauki o Materiałach, Katowice

The analysis of galvanostatic charge/discharge curves for the hydrogen powder electrode in long-term cycling conditions (N = 40 cycles) is presented. The surface of active powder (LaNi4.5Co0.5; fraction 20÷50

μm) has been modified by 8-hours magnetron sputtering using Fe-Si target. The effect of deposition of thin Fe-Si layers on functional parameters of modified electrode has been characterized. It has been shown that magnetron sputtering scarcely affects electrode discharge capacity, but it decreases a little the slope of rectilinear segment of logQdisch = f(N) relationship, thus, inhibits the corrosion degradation of the electrode. For N > 22 cycles hydride capacity of modified electrode reaches practically constant level, close to 270 mAh/g, which testifies to disappearance of corrosion degradation. The sputtered layers improve the kinetics of hydrogen electrosorption because their presence increases exchange current density of H2O/H2 system.

Keywords: LaNi5 type hydride material, magnetron sputtering, galvanostatic hydrogenation, charge/discharge

2016

Vol. 59, nr 9

s. 330-333

Bibliogr. 24

 


 

DOI: 10.15199/40.2016.9.4

Evaluation of protective properties of silane coatings modified with rhodanine

OWCZAREK E.

Division of Chemistry, Faculty of Production Engineering and Materials Technology,

Czestochowa University of Technology

The protective, anticorrosion properties of silane and polyrhodanine based bilayer coatings IBTES/pRh prepared on X20Cr13 stainless steel substrate are evaluated in this paper. Isobutyltriethoxysilane (IBTES) films were deposited by dip-coating method on steel substrates and stored in air (“aged”). Polyrhodanine (pRh) coatings were electrodeposited using the cyclic voltammetry technique. The protective properties of IBTES/pRh coatings were investigated in chloride ions solution. It was found that bilayer coatings IBTES/pRh exhibit more effective corrosion protection compared to single component pRh or IBTES coatings.

Keywords: rhodanine, silane, bilayer coatings, protection of stainless steel

2016

Vol. 59, nr 9

s. 334-336

Bibliogr. 32

 


 

CORROSION PROTECTION IN PRACTICE

DOI: 10.15199/40.2016.9.5

Examples of aliphatic polyurethane topcoats premature chalking

BORDZIŁOWSKI J.

CES, Gdańsk

Four examples of premature chalking (after 2–5 years exploitation) of aliphatic polyurethane topcoats were presented. Paints were produced by four renowned paint producers and were used in different corrosion categories of atmosphere. The owners of the investment objects claimed the coating quality. The probable cause of the coating defect was discussed as well as the proposal how to avoid them.

Keywords: Coating chalking, polyurethane coatings, nitrogen oxides

2016

Vol. 59, nr 9

s. 341-343

Bibliogr. -

 


 

CORROSION PROTECTION IN PRACTICE

DOI: 10.15199/40.2016.9.6

Logistic in the anticorrosion works

AGNIESZKA KRÓLIKOWSKA

Instytut Badawczy Dróg i Mostów, Warszawa

The problems connected with an appropriate timetable and location for anticorrosion works in the construction process is described. Deficiencies in the documents and requirements governing the implementation of these works are shown.

Keywords: anticorrosion protection, competitions for anticorrosion works, specifications of anticorrosion works

2016

Vol. 59, nr 9

s. 344-345

Bibliogr. -