What is the difference; Tin & Aluminum? (And other Questions!)

cprince

Petty Officer 2nd Class
Joined
May 22, 2008
Messages
148
I am not a metallurgist. That is likely painfully obvious by my thread title. I have a removable bow and aft casting deck project that I will get going in the spring. I am a cheap bugger and I am looking for cheap to free sources for my building material.

The decks will be aluminum as I want it to be super light weight and strong and I want it to last.

My bright ideas are as follows;

Aluminum framing/skeleton -

Will be made out of a couple of crushed/damaged aluminum ladders; Is this a good idea? Are these generally safe to use and strong enough (of course NOT using the damaged parts!).

Decking - Here is where it gets REAL muddy for me... I was thinking about using old aluminum siding... if I can find some. What I can easily get is corrugated tin roofing from the farm. This old roofing has never rusted and it has been outside for years. Could this mean that it is actually aluminum and NOT tin? I don't know the difference by looking at it. I think that tin visibly rusts and aluminum not as perceptible...

If the consensus is that this is not appropriate material to use, what would be suggested? (Think free scrap or REAL cheap!)

I will be fastening this all together with pop rivets and, perhaps self tapping screws. I will finish off the decks with exterior carpeting glued down with contact cement.

Thank you!!
 

a70eliminator

Captain
Joined
Sep 9, 2007
Messages
3,762
Re: What is the difference; Tin & Aluminum?

Re: What is the difference; Tin & Aluminum?

A magnet will not stick to aluminum.
 

jonesg

Admiral
Joined
Feb 22, 2008
Messages
7,198
Re: What is the difference; Tin & Aluminum?

Re: What is the difference; Tin & Aluminum?

Real tin is extremely expensive, its the golden colored lining inside of food cans , its a very thin coating, inert. Probably just a few atoms thick.

Corrugated non rusting roof sheeting is probably galvi.
 

Shizzy

Ensign
Joined
Aug 5, 2007
Messages
984
Re: What is the difference; Tin & Aluminum? (And other Questions!)

keep in mind just because you are building it out of aluminum doesnt mean it will be lighter. something overbuilt in aluminum will weigh the same as if it was made of wood.
 

Bob_VT

Moderator & Unofficial iBoats Historian
Staff member
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May 19, 2001
Messages
26,066
Re: What is the difference; Tin & Aluminum?

Re: What is the difference; Tin & Aluminum?

Road signs, stop signs and most highway signs are anodized aluminum. Go to a scrap yard and hunt around for old signs. The men working signs used to be 4 x 4 aluminum and have since been replaced by poly signs. Go to a highway maintenance garage and scrounge. Aluminum ladder sides will work great for structure.

If you mix aluminum with other metals (Tin, steel etc.) you will cause corrosion due to premature Galvanic corrosion.
 
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