PROBLEM OF COAL DUST ON Al AND GALVANISED STEEL ON MARINE ATMOSPHERE
PROBLEM OF COAL DUST ON Al AND GALVANISED STEEL ON MARINE ATMOSPHERE
(OP)
Dear all,
We had a project in Portugal sea side for LNG terminal. Light coal from Indonesia is currently unloaded in Sines(Portugal) harbour. We were told by the client that this coal dust is aggressive specially for aluminium and galvanised steel. Does anybody know about risk of corrosion from coal dust?
We had a project in Portugal sea side for LNG terminal. Light coal from Indonesia is currently unloaded in Sines(Portugal) harbour. We were told by the client that this coal dust is aggressive specially for aluminium and galvanised steel. Does anybody know about risk of corrosion from coal dust?





RE: PROBLEM OF COAL DUST ON Al AND GALVANISED STEEL ON MARINE ATMOSPHERE
RE: PROBLEM OF COAL DUST ON Al AND GALVANISED STEEL ON MARINE ATMOSPHERE
Biggest effect is probably destruction of the passive protective layer on the metals due to galvanic corrosion in the presence of moisture, especially seawater mist with a little acid thrown in. Coal is probably very similar to graphite in its galvanic potential, meaning it is nobler than everything except gold and platinum.
For aluminum, you might try hard anodizing (with dichromate seal).
For steel, try a hot-sprayed ceramic coating.