1996 Volume 82 Issue 3 Pages 226-231
Corrosion resistance of various materials such as iron and steel, cermet, cermet-coated steel, ceramics and ceramicscoated steel was evaluated in molten zinc, molten aluminum-zinc alloy and molten aluminum at 470, 600, 700°C, respectively. These temperatures are commonly used in continuous molten hot dip-plating line.
The results are summarized as follows :
( 1 ) All iron and steel samples tested were corroded in metal baths. But the corrosion amount was found to depend on sample composition and increased in the order Al > Al-Zn> Zn bath. Especially, the samples were severely corroded in the agitated Al bath.
( 2 ) All cermet and cermet-coated steel samples tested were corroded. Corrosion amount varied with the composition of metal bath, composition and amount of bonding metal for ceramic particles.
( 3 ) All ceramics and ceramics-coated steel samples tested were neither corroded nor markedly reacted with molten metals. However, vanadium carbide film was partially crazed and peeled off when tested in the agitated Al bath.
