corrosion rate on buried carbon steel
corrosion rate on buried carbon steel
(OP)
I am designing subsea steel structures protected by an indium aluminium CP system. The structures are supported on mudmats which have their undersides and skirts buried in the soil. The area buries has not been painted but has been included in the CP calculation as defined by DNV.
The protection of these areas has now come into question as the values in DNV may only be to cover current drainage and not protect.
I am wondering what the corrosion rates are for buried structures at 1km below the MSL.
I do not want to place zinc anodes on the underside of my mudmats unless there is no other option.
Thanks
The protection of these areas has now come into question as the values in DNV may only be to cover current drainage and not protect.
I am wondering what the corrosion rates are for buried structures at 1km below the MSL.
I do not want to place zinc anodes on the underside of my mudmats unless there is no other option.
Thanks





RE: corrosion rate on buried carbon steel
RE: corrosion rate on buried carbon steel
Cheers
Greg Locock
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RE: corrosion rate on buried carbon steel
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: corrosion rate on buried carbon steel
Steve,
I have the same interpretation as you for the dnv, and so my design fulfils the requirements,
however, is it possible that the underside of my mudmats is shielded? (mudmats have holes for installation).
...And if it is shielded, how much corrosion would be experienced? (at 4deg, low oxygen environment)
Thanks.
Alison
RE: corrosion rate on buried carbon steel
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04