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„Ochrona przed Korozją” (Corrosion Protection) No 12/2016

okładka i spis treści

 

DOI: 10.15199/40.2016.12.1

Influence of climatic ageing on protective properties of acrylic coatings

KOTNAROWSKA D.

SIRAK M.

Uniwersytet Technologiczno-Humanistyczny w Radomiu

On the grounds of Authors’ own research, destruction analysis was made of acrylic coatings (with polyurethane interlayer), used for renovation of car bodies lacquer coatings, which were aged in natural conditions (on climatic station). Investigation of coatings surface state proved that the climatic ageing period longer the coatings destruction degree higher,for example in the form of development of cracks, craters, blisters, delamination as well as chalking. Climatic ageing for 2 years caused resistance decrease of adhesive joint (tested acc. PN-EN ISO 4624:2016-05) between acrylic primer coating and steel substrate by 58%. Following ageing, the nature of the process of primer coatings pulling away from steel substrate during pull-off test was changing.

Keywords: acrylic primer coating, climatic ageing, destruction, adhesion

2016

Vol. 59, nr 12

s. 415-419

Ref. 24

 

DOI: 10.15199/40.2016.12.2

The analysis of the surface roughness impact on the structure of oxidation products layer of the alloy Ti-25Al-12,5Nb

MAŁECKA J.

Opole University of Technology, Faculty of Mechanical Engineering

This paper presents the results of the alloy Ti-25Al-12,5Nb oxidation, analyzing the impact of surface roughness on the structure of oxidation products layer. The oxidation test was carried out in hot air at 800ºC. It was found that the surface condition of directly linked to surface preparation is crucial for the adherence between the metallic substrate and the scale, and the structure of the oxidation products layer.

Keywords: orthorhombic alloys, high temperature corrosion, oxidation

2016

Vol. 59, nr 12

s. 420-424

Ref. 22

 

OCHRONA PRZED KOROZJĄ W PRAKTYCE

DOI: 10.15199/40.2016.12.3

Why are acoustic screens corroding?

KRÓLIKOWSKA A.

KOMOROWSKI L.

Instytut Badawczy Dróg i Mostów, Warszawa

NOWORYTA J.

Przedsiębiorstwo Usług Technicznych OMEGA Sp. z o.o., Kraków

The causes of the acoustic screens’ corrosion protection deterioration are described in this paper (including improper washing). Recommendations allowing to obtain higher durability of these structures are shown.

Keywords: acoustic screens, anti-corrosion protection

2016

Vol. 59, nr 12

s. 425-430

Ref. 6

 

OCHRONA PRZED KOROZJĄ W PRAKTYCE

DOI: 10.15199/40.2016.12.4

Diagnosis of corrosion of the steel reinforcement of concrete structures in zones of influence of stray currents

KUČERA B.

JEKU s.r.o., Prague

JANKOW SKI J.

SOKÓLSKI W.

SPZP CORRPOL Sp. z o.o., Gdańsk

The acquired experience has been presented in selection of methods and equipment for monitoring of corrosion during the designing process of protection means against stray current interaction on steel reinforcement of some reinforced concrete structures. Long-term observations have been described of reinforcement corrosion progress with CMS recording systems, consecutively supplemented by concrete resistivity probes, aggressive agent penetration depth probes into reinforcement, and primarily with corrosion rate probes. During the past 15 years over 150 electrical resistance probes have been installed in various objects in the Czech Republic. The application method of this measurement technique has been described. Interesting applications of the technique have been presented on chosen bridge structures.

Keywords: corrosion, concrete reinforcement, stray currents, corrosion diagnostics, electrical resistance technique

2016

Vol. 59, nr 12

s. 431-436

Ref. 12