EXPOSURE TEST STATION SIMULATED MARINE ENVIRONMENT AT KAWASAKI PLANT

Test plant-based data collection

Basic data is collected at a test plant that simulates an ocean environment. Evaluation including the weld points needed to create the actual structure is ongoing.

Seawater exposure test area

Test piece (stainless steel pipe pile cover)

Splash zone

Tidal zone

Submerged zone

After one year of exposure NAS 254N NAS 185N SUS 316L
State with marine organisms stuck to the pile
After removal of the marine organisms

No crevice corrosion

No crevice corrosion

Crevice corrosion occurred

After one year of exposure State with marine organisms stuck to the pile After removal of the marine organisms
NAS
254N

No crevice corrosion

NAS
185N

No crevice corrosion

SUS
316L

Crevice corrosion occurred

Surface of weld points on various stainless steel pipe piles. Super stainless steel has excellent resistance to seawater, with no crevice corrosion forming even where barnacles have adhered to the surface, including at weld points.

Other tests

To investigate corrosion resistance of various types of steel under actual conditions, we also conduct exposure tests on small pieces inside the seawater exposure test area.

Atmospheric exposure test

Seawater spray test

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