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Study of Galvanic Corrosion of Carbon Steel/Titanium and Carbon Steel/Titanium/Navel Brass in Seawater |
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中国海洋大学化学化工学院 |
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Abstract The natural corrosion potential,corrosion rate and
steady-stat
e polarization curves of Q235B carbon steel,TA2 titanium and navel brass in seaw
ater were measured.The galvanic current,galvanic potential and galvanic corrosio
n rate of anode and cathode of couple with different area ratio,at different tem
perature and different velocity of seawater were measured.According to the data
of the couple with different area ratio,a dynamic polarization curve of Q235B ca
rbon steel was obtained.The galvanic corrosion characters of Q235B carbon steel
/TA2
titanium and Q235B carbon steel/TA2 titanium/navel brass in seawater were invest
igated.The results showed that corrosion rate of anode increased with increasing
of area ratio of cathode/anode,temperature and velocity of seawater.But t
here was a limited area ratio.The corrosion rate of anode did not increase when
area ratio of cathode/anode was larger than the limit.When the galvanic co
uple consists of the three metals,navel brass was cathode in the system and was
protected by carbon steel.
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Received: 26 January 2006
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