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01-10-2020, 07:53
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#1
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Registered User
Join Date: Jan 2010
Location: Wickford RI
Boat: Bristol 31.1 , 31'
Posts: 39
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corrosion mast bottom
When I bought my Bristol 31 this past year the surveyor indicated that there was some corrosion at the mast base. Right now the mast is out but will be re-stepped soon. Obviously a good time to address this issue. Any ideas to prevent further corrosion?
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01-10-2020, 12:47
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#2
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Moderator
Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 6,083
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Re: corrosion mast bottom
Sand down to good aluminum, leave the surface rough for adhesion, prime and paint. Stop whatever leak left water against your mast. Move on to the next problem.
__________________
Never let anything mechanical know that you are in a hurry.
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01-10-2020, 17:57
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#4
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Registered User
Join Date: Mar 2011
Location: Southport CT
Boat: Sabre 402
Posts: 2,695
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Re: corrosion mast bottom
Before you paint, how bad is the corrosion? We saw an aluminum can on the beach today that was essentially a bunch of holes that the waves had twisted into a pretzel. If there is enough solid material, sanding it down & painting is the way to go. If it's too far gone you may need a sleeve. A photo could help us provide the right advice, but your surveyor might be the best source for a knowledgeable solution.
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05-10-2020, 05:05
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#5
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Registered User
Join Date: Dec 2009
Location: Australia
Boat: BUILT!!! Roberts Mauritius 43ft
Posts: 3,561
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Re: corrosion mast bottom
Dulux Metalshield All Surface Primer
IT DOESN"T HAVE TO BE "DULUX" (OTHER MANUFACTURERS WILL HAVE A SIMILAR PRODUCT)
A high performance metal protection primer suitable for priming mild steel, aluminium, galvanised steel and fibreglass.
Features
- Formulated with zinc phosphate
- Very Good Corrosion Protection
- Fast Drying
- Excellent Adhesion
- Available in 500ml, 1L, 4L
- Available in Grey base
Benefits
- Ideal primer for Metalshield topcoats on a wide range of metal substrates
Product code: 366H0070
Uses
Primer for all metal surfaces. Generally used as part of a protective coating system on: internal steel frames and trusses, miscellaneous metalwork.
Surface preparation
NOTE: Ensure the surface has thoroughly dried prior to application. Commercial applications may require additional surface preparation. AGED/LIGHTLY RUSTED SURFACES: Remove any rust by scraping, sanding or wire brushing. Wipe surface with Metalshield Brush Thinner to remove any residual grease, oils and dirt. NEW BARE STEEL/WROUGHT IRON: Wipe surface with Metalshield Brush Thinner to remove any residual grease, oils and dirt. GALVANISED IRON/ZINCALUME: Clean surface with sugar soap and a Scotch-Brite Pad to remove any grease, oils and dirt. Rinse with clean water. ALUMINIUM, COPPER, BRASS AND STAINLESS STEEL: Clean surface with sugar soap and a Scotch-Brite Pad to remove any grease, oils and dirt. Rinse with clean water.
Product downloads
Dulux Metalshield Epoxy Enamel Gloss
Protects against rust and corrosion
Features
Protects against rust and corrosion
- Available in 500ml, 1L, 4L
- Available in Gloss Vivid White, Gloss Deep, Gloss Ultra Deep, Gloss Extra Bright, Gloss True Red, Gloss Bold Yellow, Gloss Blue, Gloss Black, Gloss Indian Red, Gloss Mission Brown, Gloss Brunswick Green, Gloss Classic Cream, Gloss Woodland Grey, Gloss Manor Red bases
Benefits
- No primer required for new bare steel, wrought iron or pre-painted metal surfaces
- Ideal for metal gates, trailers, fences, outdoor furniture, gutters, downpipes and railings
https://www.dulux.com.au/products/me...al%20%2Bshield
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05-10-2020, 07:58
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#6
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Registered User
Join Date: Jan 2010
Location: Wickford RI
Boat: Bristol 31.1 , 31'
Posts: 39
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Re: corrosion mast bottom
Many thanks to one and all for the feedback. Unfortunately, we had a death in the family and I had to leave town and by the time I got back they had re-stepped the mast. However, this info will serve me well the next time I have the mast pulled.
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