Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Rod Speed" Newsgroups: aus.electronics,aus.cars Subject: Re: DIY Electronic Vehicle Rust Prevention Date: Mon, 26 Feb 2024 09:50:40 +1100 Lines: 93 Message-ID: References: <65dab557@news.ausics.net> <65dbbc55@news.ausics.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit X-Trace: individual.net RNU/oD+eLNtoWBPvbkQYBwMuiEq26zTj6BXsP8tXKs21RYf8s= Cancel-Lock: sha1:97jvoKdt3HnVGw5B4T06ARMXRDU= sha256:fRJk5DCayIURJGNrb/L1q2DeYUn6F+fGxIqAlFcoW3k= User-Agent: Opera Mail/1.0 (Win32) Xref: csiph.com aus.electronics:35729 aus.cars:364133 Computer Nerd Kev wrote > Rod Speed wrote >> Computer Nerd Kev wrote >>> While looking into rust-proof paints, I stumbled uponthe world of >>> electronic rust prevention gadgets: >>> https://www.erps.com.au/how-electronic-rust-protection-works/ >>> https://endrust.com.au/products-services/Electronic-Rust-Protection/ >>> https://nilrust.com.au/product-details/electronic-rustproofing/ >>> etc. >> >>> Much like with the paints, the question is whether it works, or >>> whether it's just snake oil. >> >> Rust preventing paint certainly does work. >> >> I built my house in the very early 70s and the entire >> structure is RHS, and did the two big gates out of >> RHS too. Used killrust paint and nothing has rusted >> in what is now more than 50 years. >> >> And my 2006 Hyundai Getz has not rust at all, not >> even the decent gouge that some arsehole managed >> to do in the woolys car park right in the middle of the >> driver's door, with what appears to have been the >> corner of a ute flat tray. And I have done nothing to >> protect the gouge at all. > > Yes I don't disagree at all that a good paint job works wonders, > but once it starts to wear down the ideal solution is to pull the > thing completely to pieces, sand blast it, and paint again. Never had to do anything like that with the Golf and itsstill fine even now after more than 50 years. The only problem was my stupidity of not fixing the known windscreen leak. > I'm interested in whether these devices can help put thatstage off a > bit longer, Can't see it myself. The explanation of how they allegedly work just doesnt hold water scientifically. They may work in Canada with salted winter roads but we dont have anything like that here. > because it isn't going to happen. Mate of mine did that with a very old chev vintage car. I was amazed because we helped him move what was quite literally just a pile of rusty metal. It was amazing what he turned it into, just as good as when it was new. Massive amount of work tho. > I'd still keep grinding out and painting over rust spots where > they're found. In places I can't get to I've been spraying fish > oil, though I'm thinking about using these wax sprays for a more > permanent fix. Painting over fish oil has also lasted on the cab > of an 80s truck I tried that on a few years ago. New rust in > different spots has started to appear though, as it does. >>> It's supposed to use conductive pads >>> to create a static charge on the steel vehicle body by using the >>> paint as a dilectric layer forming a capacitor. The charge prevents >>> oxidation of the metal. >> Can't see that and my formal qualifications are in chemistry. > OK. Some documents suggest it helps the zinc in paint or galvalised > steel to protect the steel more effectively, but there doesn't seem > to be a concrete theory. That does get used with ships, but that's a completely different environment with a path for the electrical current. I live in an irrigation system and the control structures are all quite literally made of stainless steel now. >>> In this discussion it's mentioned that by relying on the paint to >>> form the dilectric, it won't work in areas where the paint is weak, >>> which is where rust would start anyway: >>> https://www.electro-tech-online.com/threads/electronic-rust-protection-for-cars.13859/ >> >> What is the detail of the car ? Modern >> cars are much better than the old ones. > > These are 80s and 90s vehicles. All kept under roofs but open to > the elements. My 73 Golf does fine apart from my stupidity with the windscreen leak. and it has never lived under a roof and still doesnt. No body rust at all anywhere except inside in the floor due to the leak.