Puzzled

[Toyboy]

Great idea. I never thought of a prop repair shop for the welding. Thanks.

Also, I'm replacing that transom wood. It's already been removed so burning it is not an issue. Thanks for the heads up on that though.

 

[dstig1]

No problem - I just looked up Hayward on the map - I thought you were closer to the St Croix, but I guess not, so Stacy, MN is pretty far away from you. I'm sure you have some place in your area that can do it.

 

[Toyboy]

There are a couple in the area, no problem.

 

[foggy1111]

Good thought guys, I'll have to check the area for a shop that's good at welding aluminum. What seemed to cause the hole was corrosion or whatever they call aluminum getting pits that have a white powder in the center. Age and sitting out in the weather for 30 years are probably a major contributing factor. I've finally found (I think) a spot in the garage to store it inside. Finding a convenient space to store something 16' long can be a real hassle.
I don't believe the zinc anodes would be of any value in this case, because the canoe would only be in the water 3-4 hours at a time with intervals of a week or more in between. I think the anodes are more beneficial for boats the are tied to the dock for weeks/months on end.

What causes this corrosion problem is a process called "electrolysis". Electrolysis happens when dis-similar metals are butted together and moisture is present. In short....the different metals exchange energy via the moisture (catalyst) and cause the corroded spot you have. Some metals are more compatible than others.

 

[Toyboy]

Makes sense BUT....the canoe is aluminum and the motor is aluminum. Go figure??

 

[Danno1]

Makes sense BUT....the canoe is aluminum and the motor is aluminum. Go figure??

Yes, but usually there's a wood pad to clamp the motor to and it's usually attached with... steel hardware.

Aluminum is the more active metal. Google "galvanic series".


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