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  1. PetoriusRex

    Black "baked in" staining on aluminum extrusions after brazing process

    I work with aluminum castings and aluminum extrusions. The extrusions go through a brazing oven as part of a "core assembly"...the braze oven gets up to around 1100 degrees F, though does not stay at the temp long before starts to "cool down". I ma seeing parts with a black stain on the...

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