Rust Residue on Aluminum Boat: Removing It

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    Aluminum Gas
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Discussion Overview

The discussion revolves around the issue of removing a rust-like residue from an aluminum boat, which was caused by gasoline exposure over the winter. Participants explore potential causes of the residue and suggest various cleaning methods and considerations related to aluminum care.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes the presence of a rust-like residue on their aluminum boat after gasoline exposure and seeks advice on its removal.
  • Another participant suggests that the residue may be related to gasoline additives, cautioning against using basic solvents on aluminum due to its susceptibility to corrosion.
  • A later reply humorously acknowledges the pH of seawater and its implications for aluminum boats.
  • Participants recommend consulting boating websites for cleaning tips, although specific sites are not endorsed.
  • One participant mentions that refineries add dye to gasoline, which can cause staining, and suggests various solvents like isopropyl alcohol and acetone for removal, while warning that these may damage painted surfaces.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the residue and the best methods for removal, with no consensus reached on a definitive solution or cleaning approach.

Contextual Notes

There are limitations regarding the assumptions about the chemical nature of the residue and the effectiveness of various cleaning methods, as well as the potential impact on painted surfaces.

Who May Find This Useful

Individuals interested in boat maintenance, particularly those dealing with aluminum boats and fuel-related stains.

fishology
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I guess this is more of a Chemistry question than anything, but didn't get a response in that forum... I had gas spill onto the floor of my aluminum boat this winter, and it sat there for a few months... when I pulled the boat out this spring there was a rust looking residue on the aluminum floor. It doesn't come off with CLR. I'm wondering if anyone knows what this stuff might be, and how to get it off. Thanks
 
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Bob S said:
Do NOT use any basic (Ph>7.0) solvent to clean aluminum. Aluminum corrodes easily.

Oops, sea water has pH of 8.
 
Borek said:
Oops, sea water has pH of 8.

Ah, that explains all the disappearing aluminum boats! :bugeye:

Seriously, though, here is what I would do. Peruse a good boating web-site that has tips on cleaning. Wish I could list one, you may have to check-out a few.
 
The refineries put a dye into gasoline to identify different octanes and for other reasons. The dye comes out and forms a stain.
http://en.wikipedia.org/wiki/Fuel_dyes

To remove it is a trial and error process. You can try Isopropyl alcohol, acetone, wipng it with more gasoline, lighter fluid, brake cleaner fluid. All have all worked to some extent. However, if it is a painted surface you may have problems removing it without removing paint and starting over, depending on type of paint.

Good Luck
 

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