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The Global Cost of Corrosion

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Re: The Global Cost of Corrosion

#91

Post by jacquesm »

gandalfian wrote: post #82
jacquesm wrote: post #39

Earlier quoted context omitted.

Somewhere in the late 90's early 2000's car manufacturers switched paint processes, typically to a water based paint. That's the point in time where you could see the most clearly which manufacturers had their house in order in terms of weld cleaning, seam coating, basic material procurement and surface protection. Some of them failed horribly, which led to some brands (for instance: Mercedes) having an undisclosed h…

Hmm, we have one of the rusty c classes, made in South Africa. The doors, bonnet etc have been just fine. Underneath is the disaster. Particularly the rear end which has collapsed several times as it just rusted through in the first ten years. Bizarre. Bodged up by a backstreet garage it still goes, engine just fine, never a problem, just that faint disconcerting worry the wheels will fall off again...

Those engines last forever. I had a C-class from that vintage, it looked like you could walk in on one side and out the other without opening the doors (great: nobody ever thought of stealing that car). But the engine just kept on working and as far as I know it still runs (in Limburg, with a friend that I haven't seen since COVID).

Re: The Global Cost of Corrosion

#92

Post by kevin_thibedeau »

bliteben wrote: post #18
countvonbalzac wrote: post #3

Why aren't bridges and ships made out of stainless steel? Is it too expensive, or not as strong as regular steel?

Almost all metals oxidize. You could build something out of gold or maybe platinum and avoid oxidation, but it would obviously be expensive. The U.S. navy does have some very large aluminum ships such as the Independence Class[1]. These ships are apparently having some teething issues, but it is quite the feat to have a 414 ft long aluminum ship that can go upwards of 50 knots. [1] : https://en.wikipedia.org/wiki/Ind…

Those large aluminum ships crack because aluminum has poor fatigue performance when subjected to repeated cycling. Small aluminum boat? You're probably fine for a lifetime. 400ft aluminum boat? Good luck with that.

Re: The Global Cost of Corrosion

#93

Post by Majestic121 »

kreeben wrote: post #79
hadlock wrote: post #67

Earlier quoted context omitted.

Porsche started galvanizing their bodies in the 1970s, VW started in the 1980s, Japan only started galvanizing their bodies in export markets, in response to the germans, and only recently (last 15 years) have been galvanizing all their bodies domestic and import.

Toyotas cost nothing compared to Porches, so 1-0 Japan vs rest of the world.

VW is an affordable brand.

Re: The Global Cost of Corrosion

#94

Post by jabl »

Wrt to salt water corrosion, having been around folks involved with boats and boatbuilding all my life, the 'best' material for building a boat or yacht is an ever-green topic with no resolution in sight. Of course, for factory-produced boats made in large series, GRP reigns supreme, which is why most boats out there are GRP, but for one-offs it's still hotly debated. Steel, aluminum, wood (in all kinds of variations), GRP all have their pros and cons. People even made yachts out of ferrocement, though it seems the popularity of that method has waned.

Re: The Global Cost of Corrosion

#95

Post by JohnBooty »

bradfa wrote: post #58
jacquesm wrote: post #39

Earlier quoted context omitted.

Somewhere in the late 90's early 2000's car manufacturers switched paint processes, typically to a water based paint. That's the point in time where you could see the most clearly which manufacturers had their house in order in terms of weld cleaning, seam coating, basic material procurement and surface protection. Some of them failed horribly, which led to some brands (for instance: Mercedes) having an undisclosed h…

So everybody smartened up and now things are much better, to the point that there hardly are cars made that have serious rust issues. I find this entertaining. Come to upstate NY, USA where we liberally salt our roads in the winter. Definitely not "everybody" smartened up as it's still very common to find vehicles here that after 10 years should be declared unsafe to operate due to rust-through of critical structural…

Do aftermarket "anti-rust coatings" actually work? Y'know, the kind people are always trying to sell you at auto dealerships and the like?

Re: The Global Cost of Corrosion

#96

Post by schroeding »

ajkjk wrote: post #63
hammock wrote: post #27

Earlier quoted context omitted.

>This is an important issue. People keep talking about recycling, but much more important than recycling is just being able to use a thing for longer before you are even thinking about recycling it. Reduce, reuse, recycle. In that order

Well perhaps "retain" should be added. Making something last longer isn't quite "reduce" or "reuse".

Reduce trash by retaining things for longer. :D

But you're right, IMO. Maybe it should be retain, if you can't retain try to reduce, if you can't reduce reuse, if you can't reuse recycle

Re: The Global Cost of Corrosion

#97

Post by mattkrause »

usmannk wrote: post #88
mattkrause wrote: post #50

Earlier quoted context omitted.

Hmmmm...it's whatever Option+k does on macOS. I thought it was the degree sign because it doesn't actually combine, but apparently degree is option+shift+8 instead.

or just option+0, because degree is like a little 0 I guess?

Ha! I had been thinking Option-K like Kelvin (also a unit of temperature--but ironically one that isn't properly a "degree". Maybe that should have been a hint!)

Option-zero has a tiny underbar for me, which I think is in Bulgarian(?) abbreviations.

Re: The Global Cost of Corrosion

#98

Post by [deleted] »

hinkley wrote: post #73
hadlock wrote: post #67

Earlier quoted context omitted.

Porsche started galvanizing their bodies in the 1970s, VW started in the 1980s, Japan only started galvanizing their bodies in export markets, in response to the germans, and only recently (last 15 years) have been galvanizing all their bodies domestic and import.

Famously, 1990's Mitsubishi and Subaru vehicles can basically rust down to the frame before the drivetrain stops functioning. And they don't wait long to start on the former.

[deleted]

Re: The Global Cost of Corrosion

#99

Post by jacquesm »

JohnBooty wrote: post #95
bradfa wrote: post #58

Earlier quoted context omitted.

So everybody smartened up and now things are much better, to the point that there hardly are cars made that have serious rust issues. I find this entertaining. Come to upstate NY, USA where we liberally salt our roads in the winter. Definitely not "everybody" smartened up as it's still very common to find vehicles here that after 10 years should be declared unsafe to operate due to rust-through of critical structural…

Do aftermarket "anti-rust coatings" actually work? Y'know, the kind people are always trying to sell you at auto dealerships and the like?

That depends on the state of your paint. If the paint is still good it will help a bit because the coating will take some of the wear. But if the paint is already damaged then rust will have started and applying a coating on top of that won't make much difference, though it may slow things down a little bit.

The best protection against rust is to keep your car clean, especially from leaves, bird droppings and other debris. Wash but not too frequently and if there are scratches or other minor issues fix them immediately.

Re: The Global Cost of Corrosion

#100

Post by mattnewton »

ajkjk wrote: post #63
hammock wrote: post #27

Earlier quoted context omitted.

>This is an important issue. People keep talking about recycling, but much more important than recycling is just being able to use a thing for longer before you are even thinking about recycling it. Reduce, reuse, recycle. In that order

Well perhaps "retain" should be added. Making something last longer isn't quite "reduce" or "reuse".

Isn’t it reuse?

Reduce - don’t buy another car, reuse - keep using your car, or buy a used car, recycle - sell your old car for scrap.

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