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