Rust
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===Organization=== | ===Organization=== | ||
| − | + | =What is rust?= | |
| − | + | ==What causes rust?== | |
-- Need more background here. Plus info on why newer cars don't rust nearly as badly, and on salt/winter driving conditions. Review this article: http://www.metalwebnews.com/howto/rust/rust.html . | -- Need more background here. Plus info on why newer cars don't rust nearly as badly, and on salt/winter driving conditions. Review this article: http://www.metalwebnews.com/howto/rust/rust.html . | ||
| − | + | =How to remove rust= | |
| − | =Assessment= | + | ==Assessment== |
assessment -- what's the part? can it be removed? soaked? how large? body panel?; how bad is the rust? tricks for assessing | assessment -- what's the part? can it be removed? soaked? how large? body panel?; how bad is the rust? tricks for assessing | ||
tools/materials/methods selection -- consider time and skill. can weld? how valuable is project? have sandblaster? how much money can spend? | tools/materials/methods selection -- consider time and skill. can weld? how valuable is project? have sandblaster? how much money can spend? | ||
| − | + | ==Mechanical removal of rust== | |
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mechanical removal (flapper discs, wire wheels, etc.) | mechanical removal (flapper discs, wire wheels, etc.) | ||
| − | ===Chemical removal of rust | + | ===Media blasting rust=== |
| + | *Sand is not recommended for media blasting panels. It acts like little hammers, warping panels with by compressive forces (analagous to hail). Use softer media (list examples): 55 grit silica-based media. | ||
| + | Can be done, but must be cautious. Use a small sandblaster, or a sandblaster set on low (expand on this: distance, angle, etc.). | ||
| + | *Can sandblasting "increase" rust? Or, if the rust is removed and the metal is sealed, shouldn't it be eliminated? Some thoughts on this are: | ||
| + | **Although sandblasting may appear to have removed all the rust to the naked eye, it hasn't really done so. | ||
| + | **It's caused by water in the air compressor line, as sand will harbor some moisture. Also, compressed air contains moisture. And, sand has salt in it. A moisture trap in the line should solve the problem with the water in the air line. | ||
| + | *Many panels have seams, hems, and bends that are inaccessible by blasting, and can hold moisture and rust. | ||
| + | *Body panels can be sand blasted. However, it must be done carefully (explain). The pressure of the sand hitting the body panels causes warpage. | ||
| + | *One option is to use chemical paint stripper, then use a sandblaster to lightly "dust" the remaining rust. | ||
| + | *Media blasting can remove good metal from body panels too. Also, used media can have metal particles left in the media. | ||
| + | *Soda blasting can remove light rust, and won't warp panels. | ||
| + | *[http://en.wikipedia.org/wiki/Sugar_sand Sugar sand] is finer and less-damaging than regular sand. | ||
| + | *For cleaning in seams, a spot blaster is recommended. | ||
| + | * Take precautions with proper safety equipment (list it here) | ||
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| + | Need more info on the numerous types of media, which ones are recommended for what, cost, availability, etc. | ||
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| + | ==Chemical removal of rust== | ||
chemical removal -- spray/paint on, plus soaking | chemical removal -- spray/paint on, plus soaking | ||
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list encapsulators here | list encapsulators here | ||
| − | + | ==Removing rust from body panels== | |
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===What's the "best" way to handle body rust?=== | ===What's the "best" way to handle body rust?=== | ||
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*'''If you're dealing with a complete vehicle body with rust, have it commercially dipped.''' | *'''If you're dealing with a complete vehicle body with rust, have it commercially dipped.''' | ||
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===Accessing rust between interior panels=== | ===Accessing rust between interior panels=== | ||
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Turn panels around to slosh rust remover around. Blow compressed air inside the panel. | Turn panels around to slosh rust remover around. Blow compressed air inside the panel. | ||
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| + | ===Removing pitted rust=== | ||
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| + | ===Removing rust in seams=== | ||
Spot blaster is useful. | Spot blaster is useful. | ||
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Products: | Products: | ||
#[http://sem.ws/product.php?product_id=97 SEM High Build Self Leveling Seam Sealer] | #[http://sem.ws/product.php?product_id=97 SEM High Build Self Leveling Seam Sealer] | ||
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#Weld-Through Primer: a zinc-rich coating that conducts current from a welder. It can provide protection on lap welds and inner weld seams. As a general rule, weld-through primer is applied to the mating areas when welding body panels. List a few commercially available weld-through primers here. 3M, U-Pol, etc. It doesn't burn off when welding. | #Weld-Through Primer: a zinc-rich coating that conducts current from a welder. It can provide protection on lap welds and inner weld seams. As a general rule, weld-through primer is applied to the mating areas when welding body panels. List a few commercially available weld-through primers here. 3M, U-Pol, etc. It doesn't burn off when welding. | ||
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Research this. | Research this. | ||
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| + | ==Miscellaneous== | ||
===Cleaning light surface rust off crankshaft=== | ===Cleaning light surface rust off crankshaft=== | ||
Have a machine shop do it, or: | Have a machine shop do it, or: | ||
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