xltsport
Marine/Ocean
- May 9, 2002
- 7
Our vessels are suffering from extensive pitting corrosion inside the inert gas scrubber tower.
The scrubber towers on these vessels are manufactured from Stainless grade AISI 316L.
We also have an older vessel with an inert gas system from the same manufacturer where there is no corrosion problem.
The material of this unit is Stainless grade SS 2343.
As per the maker, the problem on the newer units is caused by Fe particles from corrosion in the sea water supply piping to the units being carried over inside the scrubber, impinging on weld seams and establishing a pitting corrosion cell.
I find this hard to believe as iron is more anodic than stainless and I would expect the iron to disappear to protect the stainless.
Any views and pointers to reference materials/sites would be appreciated.
Thanks
The scrubber towers on these vessels are manufactured from Stainless grade AISI 316L.
We also have an older vessel with an inert gas system from the same manufacturer where there is no corrosion problem.
The material of this unit is Stainless grade SS 2343.
As per the maker, the problem on the newer units is caused by Fe particles from corrosion in the sea water supply piping to the units being carried over inside the scrubber, impinging on weld seams and establishing a pitting corrosion cell.
I find this hard to believe as iron is more anodic than stainless and I would expect the iron to disappear to protect the stainless.
Any views and pointers to reference materials/sites would be appreciated.
Thanks
