surface roughness and cleaness 2

[mectarek]

I want to understand the downsides of the amplitude on the surface being too rough and the relationship between surface roughness and the degree of cleanness (Sa2, Sa2.5,... SA3).

From what I know, the peaks of metal will be exposed through the primary coat, but what if we thikens the primary a little bit to manage that. Because from what I have seen before it's hard to obtain a degree of cleeness of SA 2.5 for exemple in the roughness range required (40 to 75 um).


Thank you in advance.

 

[IRstuff]

You should be careful to not confuse "clean" with "rough;" they are not synonymous. "Clean" means free of contaminants, while "rough" denotes the degree of smoothness of a surface.

TTFN (ta ta for now)
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[david339933]

If you can't get SP-10 with 1.5 - 3.0 mil profile, you are using the wrong size/type blast media.