Volvo Corrision problems

teker · **Posted:** Sun Nov 11, 2012 7:29 pm

I have major corrosion issues on my Volvo DP drive. Need to have blasted and re painted. Any idea what could be causing it and what I should paint it with?

deafwish · **Posted:** Sun Nov 11, 2012 8:29 pm

I trust your outdrive fitted anodes are still attached & within spec?

teker · **Posted:** Sun Nov 11, 2012 8:53 pm

Magnesium anodes ( fresh water) were pretty well eaten up. I have had this problem for the past 3 years, but this year was worse by far.

taz42169 · **Posted:** Sun Nov 11, 2012 10:26 pm

May want to consider changing them half way thru the season.

acguy · **Posted:** Mon Nov 12, 2012 8:04 am

Is anyone else around you having issues, could be an issue of a boat having stray currents.

Graham R · **Posted:** Mon Nov 12, 2012 8:21 am

Make sure all the bonding wires that connect up all the individual casings are still attached and in good shape. There should be electrical continuity for the whole drive ( and transom shield). if not, the anodes will not protect the isolated items,

Also, there should be electrical continuity between the anodes and the drive; I check mine each year when I replace the anodes (I have the OP active corrosion protection system; my anodes usually last at least 2 six month seasons in salt water )

ric · **Posted:** Mon Nov 12, 2012 8:29 am

Happens. Change anodes when they wear out.

rpengr · **Posted:** Mon Nov 12, 2012 8:44 am

acguy wrote:

Is anyone else around you having issues, could be an issue of a boat having stray currents.

Are you using a battery charger or other shore power connection? If so, you might be causing your own stray current corrosion. If not, you could be getting stray current corrosion from a nearby boat, or metal parts of the dock itself (or dock wiring)

Look up "Stray Current Corrosion" online, as the explanation and solutions are to lengthy to put here. Without stray current corrosion, I don't think there's anyway your anodes could get eaten up that fast in fresh water.

teker · **Posted:** Mon Nov 12, 2012 9:10 am

I have been in the same slip for 13 years and it is the last 3 that I have had a problem. Everyone's anodes took a beating this year but no one had corrosion like I have. I'm on shore power all the time a leave the battery charger on. I do have an isolator installed.

ric · **Posted:** Mon Nov 12, 2012 10:32 am

Water pollution?

teker · **Posted:** Mon Nov 12, 2012 12:18 pm

In the Ohio River. Lots of pollution.

teker · **Posted:** Mon Nov 12, 2012 12:18 pm

In the Ohio River. Lots of pollution.

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Volvo Corrision problems

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