Metal compatability for hinges?

[hardwoodcd]

When I get to the point of attaching my deck to my aluminum framing I was planning on using stainless steel screws, bolts, washers, nuts and hinges. Is this ok? I've read some things that concern me

 

[Johnny]

you have done an AWESOME job on your build so far !!

not to give you a yes or no to your question:
but, many of us use stainless fasteners with aluminum parts
with little to no ill effects. If you are in a total salt water environment,
you may see more incompatability than someone in the middle states.
how often your boat gets wet and stays wet during storage is another factor.
a paper mill in your neighborhood will definately be another negative factor.

I ran across this article on the subject by Fastenal Fasteners the other day.
you might find it an interesting read for any future concerns.
View attachment AL vs SS.pdf

 

[Macrosill]

I thought we were best advised to avoid galvanized steel fasteners and use stainless steel fasteners. According to the chart galvanized fasteners would be better to use with aluminum and aluminum alloys as they would be less likely to corrode from being in contact with one another. I am guessing this is minus any type of catalyst such as salt or brackish water? It just gets more confusing the more you read, lol.

And, yes, the OP is doing an awesome job on his mod!

 

[rednecknproud21]

you have done an AWESOME job on your build so far !!

not to give you a yes or no to your question:
but, many of us use stainless fasteners with aluminum parts
with little to no ill effects. If you are in a total salt water environment,
you may see more incompatability than someone in the middle states.
how often your boat gets wet and stays wet during storage is another factor.
a paper mill in your neighborhood will definately be another negative factor.

I ran across this article on the subject by Fastenal Fasteners the other day.
you might find it an interesting read for any future concerns.
View attachment 1

I don't understand what the paper mill has to do with the type of fasteners. Please educate me.

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[Johnny]

paper mills produce tons of sulfuric acid rain in a 1 mile radius.
especially bad on mornings with heavy fog.
you can not fully understand the damage a paper mill can do unless
you have lived near one. The upper management at a paper mill have covered
parking areas..... general employees park outside in the open and this is a
photo of a typical "mill car".

At the exit of the mill, there is a spray wash that you drive through to "help"
wash off the junk that the mill creates.
items such as window air conditioners and car radiators with aluminum cooling fins
really suffer a short life span. Boats in the area with aluminum anything also
exhibits faster than normal corrossion.



.

 

[rednecknproud21]

paper mills produce tons of sulfuric acid rain in a 1 mile radius.
especially bad on mornings with heavy fog.
you can not fully understand the damage a paper mill can do unless
you have lived near one. The upper management at a paper mill have covered
parking areas..... general employees park outside in the open and this is a
photo of a typical "mill car".

At the exit of the mill, there is a spray wash that you drive through to "help"
wash off the junk that the mill creates.
items such as window air conditioners and car radiators with aluminum cooling fins
really suffer a short life span. Boats in the area with aluminum anything also
exhibits faster than normal corrossion.



.

I see that would be a pain.

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[stinkfoot]

Try living in the same town as a cement plant. Gives new meaning to ' A hard rain's gonna fall'.... if bolting you can always separate the two metals with a smear of 5200.

 

[derekdiruz]

Why not use aluminum pop rivets. They're cheaper and easy to use and replace, plus none of this to worry about.

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[hardwoodcd]

Johnny to the rescue again! I think I may just start my threads out like this - hey Johnny, what are your thoughts on this subject! Thanks again!

I'm completely freshwater. Northern Illinois. I thought about rivets but was thinking with bolts and screws that i could take things apart if I ever needed to.

 

[hardwoodcd]

Also I put in a few hours today on the boat. Front deck completely framed! And started on rear deck. I'll be updating the build thread tomorrow. And I appreciate the kind words about the build! Nobody has commented on it. Was starting to think I was screwing it up!

 

[sonny.barile]

Stainless with a glob of marine sealant is the ticket. Make sure you put it on both sides of the holes so it goes through. Works like a charm.....Big flat washers are your friend.

My 16 ft aluminum was purchased and rigged by a dealer in a salt water community. They insulated everything. My boat is used in mostly in the brackish rivers in my area. Sometimes I venture out in the salt. Boat gets a good top down scrubbing after that. I also keep the boats bottom insulated from the bunks. I have the bunks covered with Loadrite bunk caps. No copper/salt in the carpet issues.