Naslov
Investigation of stainless steel crevice corrosion by a new test method in natural and biosynthetic seawaters, and in chloride solutions

Autori
O. Šarc-Lahodny (O.Lahodny-Šarc), Lj. Krstulović, B. Kulušić, D. Sambrailo, J. Ivić

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
EUROCORR 2004, Long term prediction & Modelling of Corrosion, EFC Event No.266, Nice, France 12-16 September 2004 / Oh. Marcus, J. Vogelsang, I. Frateur - Nica, 2004

Skup
EUROCORR 2004, Long term prediction & Modelling of Corrosion, European Corrosion Conference.EFC event 266, 12-16 September 2004, Nice, France

Mjesto i datum
Nica, Francuska, 12.09.2004. - 16.09.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
crevice corrosion; stainless steel; seawater; chloride solutions
(revice corrosion; stainless steel; seawater; chloride solutions)

Sažetak
Austenitic and duplex steels have been investigated on the crevice corrosion in natural, synthetic biochemical seawaters, and in 3.5% sodium chloride solution using a new test method developed by the Group Crevcorr of the Marine Corrosion Working Party of the European Federation of Corrosion. Crevice corrosion of passive alloys is one of the main risk of corrosion attack in the seawater. The other generally used tests have been shown to be valuable for ranking different alloys related to the environmental parameters.New test takes into account the geometry of the formed crevice, gasket materials, applied torque, finishing surface and the composition of synthetic electrolyte or natural water, potential increase rate and temperature.In this work the natural seawater from the Adriatic Sea in Dubrovnik, Croatia, was used to be compared with biochemical synthetic water, and the chloride solution, with the sodium chloride concentration adequate to the chloride content at the location in Dubrovnik. In the synthetic seawater organic component was replced by glucose and glucose oxidase. To assess the influence of natural bio film, glucose oxidase, and chloride content, on the crevice corrosion initiation, the monitoring of the free corrosion potential and the redox potential was performed at 20, 30, and 40 centigrades respectively, during five days with steel specimens in all three solutions.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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