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Posted: 12/11/2005 8:13:33 AM EDT
| I have a RRA 20" hbar that I had turned down to just above govt. length, it would appear that when the people doing the work removed/re-installed the barrel they caused the anodizing just below the chamber to flake off exposing the aluminum. The exposure is apprx. 3/8" long & 1/4 @ it's widest point & only the depth of the anodizing, any concerns other than cosmetics that I need to be worried about ? Thanks ! |
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Type III hardcoat is a multistaged process. The most important part is the the actual oxidization of the part in an electrically charged sulfuric acid bath. This is what what builds the aluminum oxide that provides the surface hardness to your receiver. It cannot flake. It is part of the aluminum itself and even penetrates into the aluminum. This leaves the aluminum a grey color. The next part is to dye and seal the aluminum oxide growth using a black dye. It also becomes part of the aluminum plating. If there is a section that was masked by the rack or another part in the bath, there may not have been enough or any growth there. The dye was simply sticking to the aluminum and it flaked off. That or it is another finish that was applied. Anodizing can chip at sharp corners etc. because there is almost no growth on sharp corners but should never flake off as it is essentially integral to the aluminum. Simplest fix is to lightly mediablast with sharp media. This will expose any other patches. Do not remove the anodizing, just dust it with the media. Then gun coat it black with TR or KG gun coat and bake. It will look better than new. Duracoat can also be applied to skip the baking stage. Be aware that duracoat is not completely cured for over a month. |
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