Kurita Engineering Co.

Ōsaka, Japan

Kurita Engineering Co.

Ōsaka, Japan

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Kawabe A.,Kurita Engineering Co. | Ikeda D.,Kurita Engineering Co. | Yamamoto N.,Kurita Engineering Co. | Saito K.,Softem Co. | Muroi T.,Oceanic Planning Co.
Zairyo to Kankyo/ Corrosion Engineering | Year: 2014

A flange joint with Zinc anode was used. It was immersed in filtered natural seawater. After 84 days no sign of crevice corrosion was found on the SUS304 flange with Zinc anode, while crevice corrosion ,maximum depth of 0.26mm, occurred on the SUS 304 flange without Zinc anode near the edge of the gasket sheet.


Kawabe A.,Kurita Engineering Co. | Yamamoto N.,Kurita Engineering Co.
Zairyo to Kankyo/ Corrosion Engineering | Year: 2013

In the clean seawater without chlorination, the protective film of copper alloy tube is biofilm. The biofilm is damaged by low chlorination, therefore the biofilm is necessary to reinforce by Fe2+ injection. The protective film can be evaluated by measuring polarization resistance. According to the polarization resistance value, we regulated the concentration of Fe 2+. Here we report a result for about four years. With this method, good corrosion control and good cleanliness have been maintained.

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