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Coating Steel & Aluminum for Marine Applications

Q. Dear Ted and the finishing.com forum.

Your site is causing miracles in my project and things that have never moved are now moving!

My company designed and assemble a stabilized antenna for the merchant shipping industry. That means that tankers, container ships and even car carriers and bulk (aka dirty) ships buy our antenna. It is marine, all weather (including sand storms). yummy!

What is your view on how to cost effectively protect steel 1018 and aluminum A356-T6 to
withstand these conditions powerfully?

Cost is, of course, a consideration and we are willing to look at more expensive solutions.

Looking forward to your response.

Zevi Kremer
manufacturer - Brooklyn, New York, USA
September 2, 2010


A. Titanium based PVD coatings are known to provide corrosion protection. Shape, size and quantity are some important considerations. One has to optimise the coating for each application.

H.R. Prabhakara - Consultant
Bangalore Plasmatek - Bangalore Karnataka India


? Is there an electric contact between the steel and the aluminium?

Klaus-Martin Hentrich
- Engelskirchen, Germany


Marine Corrosion

marine_corrosion
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A. Hi Zevi,

There is probably no environment as corrosive as that on ocean going ships and offshore platforms. Metallic finishes are probably not as appropriate as organic finishes like paint and powder coatings. Kynar paints would probably be the most corrosion resistant finish, but scrapes, abrasions, and pinholes in such coatings are possible, so anodizing of the aluminum and hot dip galvanizing of the steel underneath such coatings would probably provide the ultimate protection.

Luck & Regards,

ted_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.




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