Did I once hear that coke removes rust on this list? ----- Original Message ----- From: "carl" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, March 02, 2008 4:03 AM Subject: Re: [BlindHandyMan] Rust and rust prevention
> yes thanks for this info but this does'nt tel me how to remove the rust > from my tools after my work shop rough leacking > ----- Original Message ----- > From: Ray Boyce > To: [email protected] > Sent: Sunday, March 02, 2008 2:02 AM > Subject: [BlindHandyMan] Rust and rust prevention > > > Rust. It's a small word that can cause so much grief. Rusted bolts on a > vehicle can make them difficult to repair, which adds to the cost of any > repair > work. Rusted sheet metal looks unsightly and devalues the vehicle. Let > the > rust get out of hand, and body panels can become rusted completely > through, > possibly causing structural failures or allowing exhaust fumes into the > passenger compartment. This is extremely hazardous and in most areas of > the > country, > can cause the vehicle to be certified unsafe to be driven. The > hard-earned > money you spent on that automobile just became almost worthless. So how > do > we > prevent our vehicles from rusting? > > Automobile manufacturers have been helping. Almost all metal body panels > with the exception of roof panels on newer vehicles are galvanized. This > zinc coating > helps protect the metal from rusting, although it won't totally prevent > it. > Exterior trim and badges are often glued to the body rather than bolted > in > place so there are no holes in the body with chipped paint edges to allow > rust to start. More durable seam sealers are used during assembly, and > most > vehicle > manufacturers use electrostatic charges to attract primer paints into > difficult to access body areas so that the complete body receives a > protective coating > during the assembly process. Even with all this attention to preventing > rust, mother nature still takes her toll and you see rusty vehicles on > the > road. > > Rust is a chemical reaction between iron molecules in the steel panels > and > oxygen. Add some moisture and/or heat and the chemical reaction occurs > much > faster. > During the rusting process, a very small electrical current is generated, > similar to the chemical reaction that takes place inside a battery, but > with > a much smaller charge. Hook up a sensitive voltmeter to a rusting panel > in > contact with salt water (salt accelerates the rusting process) and you > can > actually > see the electrical potential generated. > > Coating the body so that oxygen and moisture can't get at the metal is > one > method of reducing rusting - that's what paint, undercoatings and waxy > rust > prevention > coatings do, but coatings aren't perfect. Scratches or stone chips in any > coating will expose the metal. Rust occurs at the molecular level, so > even > the > smallest mark can let rust start and it will continue to grow under the > coating. I have seen large chunks of paint fall off badly rusted cars, > where > the > paint looked pretty good but the metal was eaten almost entirely away. > > Another way of reducing rust is to fight it electrically. Remember how > rust > creates electrical power? What if we could reverse the power? That's the > concept > behind electronic rust prevention systems. This system uses capacitance > by > attaching plates to the body to create a negative charge on the vehicle's > body. > The negative charge counteracts the electrical charge of the rusting > action, > slowing rust formation. > > Other systems use cathodic protection, which is the real name of the > technique these companies are trying to sell. This method of using a > sacrificial cathode > has been used with success to protect against corrosion on many > structures > and systems including sea-going ships, buried pipelines, and even > reinforced > concrete. The system produces a reverse charge in the component or > structure > to slow or prevent the rust action from taking place on the body and use > up > the cathode material instead. There's a catch however. > > To create an electrical current, there must be a complete electrical > circuit. In boats, the water forms one part of the circuit. In buildings, > the ground > forms one part of the circuit. Cars however, are not immersed in water or > buried in the ground. If there was a good return path through water or > dirt, > this concept might work, but it doesn't have one. Another problem is that > to > create a charge over the complete vehicle body, the electronic rust > prevention > systems would have to use enough electricity from the vehicle's battery > that > it would keep draining the battery so your vehicle wouldn't start. > > Would I recommend electronic rust prevention? No. I would save my money > and > apply it to keeping the vehicle clean. Rust occurs mostly where dirt and > debris > collect in recesses in the vehicle body. This area dries out slowly, so > rust > has a prime environment to occur. Wash under the vehicle thoroughly, > inside > front fenders and along trim to flush dirt out of corners. A clean > vehicle > dries quicker and dry vehicles rust very slowly. > > > > > > [Non-text portions of this message have been removed] > > > > To listen to the show archives go to link > http://acbradio.org/handyman.html > or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > Visit The Blind Handy Man Files Page To Review Contributions From Various > List Members At The Following address: > http://www.jaws-users.com/JAWS/handyman/ > > Visit the archives page at the following address > http://www.mail-archive.com/[email protected]/ > > If you would like to join the JAWS Users List, then visit the following > address for more information: > http://www.jaws-users.com/ > For a complete list of email commands pertaining to the Blind Handy Man > list just send a blank message to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > >
