Rust, pitted
| Line 15: | Line 15: | ||
===Removing the rust in the pits=== | ===Removing the rust in the pits=== | ||
[[Image:blank.jpg|right|thumb|350px|Rust removed from pits. Now the bare metal needs to be cleaned and filled. If you have this image, or can take the necessary photograph, please [[Special:Upload|upload it to the wiki]].]] | [[Image:blank.jpg|right|thumb|350px|Rust removed from pits. Now the bare metal needs to be cleaned and filled. If you have this image, or can take the necessary photograph, please [[Special:Upload|upload it to the wiki]].]] | ||
| − | First, all visible rust must be removed | + | First, all visible rust must be removed using one or more of the methods listed below. |
====Mechanical removal of pitted rust==== | ====Mechanical removal of pitted rust==== | ||
| Line 23: | Line 23: | ||
====Chemical removal of pitted rust==== | ====Chemical removal of pitted rust==== | ||
*Let naval jelly sit on the area, overnight if possible. Cover it with plastic wrap to keep it from drying out. | *Let naval jelly sit on the area, overnight if possible. Cover it with plastic wrap to keep it from drying out. | ||
| − | *If it's practical to remove and soak the panel or part, there is also the option of using electrolysis for rust removal | + | *If it's practical to remove and soak the panel or part, there is also the option of using electrolysis for rust removal or using one of several products that require a rusted part to be completely immersed. |
| − | * Another alternative is to use Phosphoric Acid. It is readily available at home centers such as Home Depot under brand | + | * Another alternative is to use Phosphoric Acid. It is readily available at home centers such as Home Depot under the brand name Phosphoric Plus. It may be brushed on or a part may be soaked in the solution. Heavy pitting will take multiple applications with some wire brushing in between to speed the process. The chemical reaction of the phosphoric acid with iron oxide produces black, water-soluble iron phosphate, which can be scrubbed off. A follow up passivating treatment containing zinc phosphate, such as PPG DX520, can be used to prevent flash rusting. Phosphoric acid rust-removing products may or may not contain zinc phosphate, so read labels and directions carefully. |
====Removal with heat==== | ====Removal with heat==== | ||
| − | *Heat the pitted area until it glows, then cool it with oil on a rag. This fix should only be used on small areas | + | *Heat the pitted area until it glows, then cool it with oil on a rag. This fix should only be used on small areas because it can warp the surrounding metal, causing wrinkles and shrink marks. ''(confirm that this is acceptable practice, sounds borderline)'' |
===Handling rust pinholes=== | ===Handling rust pinholes=== | ||
Rust pinholes can be difficult to repair because the "hole" is usually more like a "crater". The hole itself is at the bottom of a thinned-out, crater-like area of metal. | Rust pinholes can be difficult to repair because the "hole" is usually more like a "crater". The hole itself is at the bottom of a thinned-out, crater-like area of metal. | ||
| − | First, remove any rust | + | First, remove any rust using the above methods. |
Then, these methods have been mentioned ''(confirm)'': | Then, these methods have been mentioned ''(confirm)'': | ||
| Line 40: | Line 40: | ||
==Filling in the pits== | ==Filling in the pits== | ||
| − | [[Image:blank.jpg|right|thumb|350px|The pitted areas have been filled. If you have this image | + | [[Image:blank.jpg|right|thumb|350px|The pitted areas have been filled. If you have this image or can take the necessary photograph, please [[Special:Upload|upload it to the wiki]].]] |
| − | Now that the rust has been removed, the pitted area of bare metal has to be filled. First, clean with a wax and grease remover ''(confirm this, and add other cleaning/coating options here)''. Then, the pits are typically filled by priming with a high-build primer, filler | + | Now that the rust has been removed, the pitted area of bare metal has to be filled. First, clean with a wax and grease remover ''(confirm this, and add other cleaning/coating options here)''. Then, the pits are typically filled by priming with a high-build primer, filler or similar product. Generally, the less product used, the better. However, it may be necessary to repeatedly prime and block sand to fill the pits. |
Your Privacy Choices