Study on effect of ozone for corrosion behavior of mild steel in seawater

本研究的目的是开发钢材板式换热器。我们已经知道臭氧对浸泡在海水中的钢材具有防腐作用。船用热交换器的冷却水采用海水。因此海水防锈采用钛，换热器板材采用钛。钛的价格很高。如果板材是钢而不是钛，我们就可以廉价地生产热交换器。并将使用大量廉价的热交换器。为了开发钢板换热器，我们进行了各种实验，研究了防锈效果与海水循环、臭氧浓度、海水流量、海水温度的关系。并探讨了臭氧、反式氧化与防锈效果的关系。最后制作了一块钢板，并用换热器进行了防锈试验。

The purpose of this study is the development of plate heat exchangers made by steel materials. We have known that ozone has a corrosion protective effect on steel dipped in seawater. As for cooling water of heat exchangers for ships, seawater is used. So titanium are adopted for prevention of rust for the seawater, plate of heat exchanger is made of titanium. The price of titanium is high. If the plate is made of steel instead of titanium, we can produce the heat exchangers cheaply. And a lot of cheap heat exchangers will be used. For the development of steel plate heat exchangers, we carried out each experiment and investigated the relations between prevention of rust effect and seawater circulation, ozone density, seawater flow, seawater temperature. And we investigated the relations between ozone, TRO and prevention of rust effect too. We finally manufactured a plate made by steel and experimented on the prevention of rust effect by using a heat exchanger.