Corrosion ?
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Meeker
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2018 Expy XLT build Apr 8, 2018 - no bubbling or aluminum corrosion in evidence yet. I had the hood corrosion problem on the 2006, probably started being visible about 5 years in. Never had the tailgate corrosion though.
I have a 17’ AlumiDuty and no signs of corrosion. Even where the paint has been chipped. Year old Expy no signs either. I have noticed the paint is very thin. I live in Utah a they use salt and salt brine.
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Deadman
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My 18 Expedition looks great yet, but my wifes uncle owns a local body shop and he said he sees many aluminum doors coming in with the seams swollen from oxidation. I had him coat all the inner body panels, inner doors, etc with a rust proofing oil to help slow this process. It coats the metal in oil so its not as easy for the corrosion to start.
The Aluminum is too new to really know the full effects of salt over a long time.
The Aluminum is too new to really know the full effects of salt over a long time.
What year models is he talking about seeing? This is a known issue on the ‘17’s and older but, apparently, Ford rectified this issue. It came from stamping aluminum panels with the same stamps used for steel or something... I don’t recall the details but I do remember the mystery being solved.
Deadman
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He just said various brands and years were all showing the swelling. No particular vehicle or brand.
I guess I'm from Missouri. I never believed that stamping used for steel theory. IMHO that's another urban legend that's repeated over and over again so pretty soon everybody believes it's true because they have heard it so many times. Kind of like MSM. It's on every channel repeating it over and over so must be true.
I read this from a ford employee forum but I’m no expert either. I also take the MSM with a grain of salt.
also, you guess you’re from Missouri... you heard tell or just aren’t sure?
Scottorama
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I have a bunch of pitting in the chrome on the tailgate. Completely unacceptable. 2018 max
From my 2 current Expys ... the paint bubbling on the aluminum hood and tailgate seem to all be at terminations or where the metal is folded over (front of hood for example). My theory (amateur hour) is that the metal and paint expand & contract at different rates, paint micro cracks at the stress point, and water can intrude. Then moisture is trapped between the two materials for an extended period and can react chemically forming aluminum oxide, which is a white powder. If you pick a paint bubble off ... There is always white powder and the aluminum is pitted. That's my theory and I'm sticking with it. But, wtf do I know?
Randy Schmidt
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I don't have any rust or bubbling on my 2018 Max. All is good so far.
Yes always white oxidation powder. I'm trying to get experiences or even body shop info on best way to stop or seal it if you pick it off or smooth a small spot, like finger nail size, and want to seal it and touch it up to stop spreading.
Should be easier than steel and the rust always comes back just a matter of how fast.
I have used Ospho on metal but don't really see it working as well as most say it does.
Did a spot on a roof of old car. Ground it down quite a bit, Opspho'd it, then duplicolor spray touch up. Can't really remember if I cleared it or not but it started to come back in a few months.
I use to use Permatex Extend which is now owned by Loctite. At least the Extend name is.
FYI, they both still make the rust spray. Permatex is a rust converter or something like that and Loctite is Extend.
You can get Loctite cheaper than Permatex.
I have had really good results on a few small spots over the years getting as much rust out as possible, Extend it once or twice, then touch up with paint, then clear over.
Had some spots or chips that lasted 6-8+ years and never spread or bubbled around it.
No body rust on my 19 but I was seriously disappointed at the amount of surface rust under it. Frame rails, muffler, driveshaft, front end components... all had various amounts of rust. For 6000 miles, I thought it was unacceptable for a 67k truck.
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If you plan on keeping one long-term you should take it and get it and see barded early on or under hood at yourself. People want to complain about undercoating causing problems but if you get to it when it's fresh without any rust and do it when it's good and dry out so there's no moisture underneath it it will help prevent that service rust. Or you can use products Krown or Corrosion Free. I'm getting ready to order either 2 gallons or 5 gallons of corrosion free and coat a couple of really clean low mile older vehicles that I don't want to start to rust.
There's something it just makes me really really happy to look underneath a 20 year old vehicle and see a frame that looks like it's less than a year old
Deadman
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The frame and suspension on my 18 were rusted noticeably when I took delivery of it. Pretty pathetic for the coin they charge.
I did undercoat it after, but I didn't expect their paint and prep to be a complete joke. My wifes 10 year old Hyundai has 175K on it and theres no rust under it and it lives in road salt. I wish I knew what paint their Koreans used, because it absolutely worked amazingly!
I did undercoat it after, but I didn't expect their paint and prep to be a complete joke. My wifes 10 year old Hyundai has 175K on it and theres no rust under it and it lives in road salt. I wish I knew what paint their Koreans used, because it absolutely worked amazingly!
All my underside is painted but the drivelines and axles. I was pretty surprised. I usually paint everything with POR15. Super good stuff. Paint it on with a brush and it self levels. It’s does not have UV protection, but under the body I have had zero trouble with it loosing its color. They do make a UV coating for it.
https://www.por15.com
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https://www.por15.com
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What was the process you went through to prep? Did you exhaust also? Ive heard good things about por15 so I guess that'd my direction im going
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I paint the exhaust with black stove paint and it holds up pretty good. The tiny muffler thing at the rear of mine is already painted black. They make a degreaser and a metal prep. Pretty easy. Like any paint work the better the prep the better the finished product is. But I have ran steel wool over parts blew the dust off and painted them with the POR15 and it held up pretty good. I have a old Jeep rock crawler that I sand blasted the axles and painted with POR15 and they still look good 20 years later. It’s good stuff it not in the sun.
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