Publication detail

Influence of the urea on corrosion process of aluminium alloys

NOVOTNÁ, E. NEMCOVÁ, A. PACAL, B. TULKA, J.

Czech title

Vliv močoviny na korozní chování hliníkových slitin

English title

Influence of the urea on corrosion process of aluminium alloys

Type

lecture

Language

en

Original abstract

This paper deals with corrosion behaviour of AlCu4Mg1 alloy in the aqueous solution inclusive 0.07 mol of urea + 0.03 mol of sodium chloride dissolved in the water. Corrosion tests were performed as a modified OECD technique. The samples were placed into the small testing cells for provision no interaction of the samples. There were 30 ml of corrosion solution on the bottom of each cell and the samples were hung up above the surface. Testing mode was cyclical (8 hrs 35 C, 16 hrs 23 C – 1 cycle). The experiments were carried out with increasing exposition time (1, 5, 10, 20, 31 and 42 cycles). The weight losses were evaluated and the statistic analysis was performed. First the Dixon test extreme deviations (maximal and minimal values) and then the corrosion rate [g m-2 d-1] were calculated from the weight losses.

Czech abstract

Článek se zabývá korozním chováním slitiny AlCu4Mg1 v směsi 0,07 mol močoviny + 0,03 mol chloridu sodného. Korozní testy probíhaly podle modifikovaných testů OECD. Vzorky byly umístěny do malých zkušebních cel jednotlivě. Na dno zkušebních cel bylo pipetováno 30 ml zkušebních roztoků a nad jejich hladinou vzorky před uzavřením zavěšeny pomocí silonu tak, aby se nedotýkaly zkušebního roztoku. Zkušební režim byl cyklický (8 h teplota 35 st.C, 16 h teplota 23 st.C – 1 cyklus). Časová řada byla pro testy stanovena 1, 5, 10, 20, 31 a 42 cyklů. Bylo provedeno hodnocení hmotnostních úbytků korozí a soubor hodnot podroben statistické analýze: nejprve Dixonovým testem extrémních odchylek a poté hmotnostní úbytky přepočítány korozní rychlosti [g.m-2.d-1].

English abstract

This paper deals with corrosion behaviour of AlCu4Mg1 alloy in the aqueous solution inclusive 0.07 mol of urea + 0.03 mol of sodium chloride dissolved in the water. Corrosion tests were performed as a modified OECD technique. The samples were placed into the small testing cells for provision no interaction of the samples. There were 30 ml of corrosion solution on the bottom of each cell and the samples were hung up above the surface. Testing mode was cyclical (8 hrs 35 C, 16 hrs 23 C – 1 cycle). The experiments were carried out with increasing exposition time (1, 5, 10, 20, 31 and 42 cycles). The weight losses were evaluated and the statistic analysis was performed. First the Dixon test extreme deviations (maximal and minimal values) and then the corrosion rate [g m-2 d-1] were calculated from the weight losses.

Keywords in Czech

hliníková slitina, korozní testování, močovina, chlorid sodný

Keywords in English

aluminium alloy, corrosion test, urea, sodium chloride

Released

14.09.2011

Location

Brno, Czech Republic. Chemistry & Life 2011