Powdercoating cases pre bake?

[vrx46]

I have my cases sand blasted ready to powder coat, I read somewhere you should bake them first and that will get any excess oil to come out of the pores in the aluminum, is this true? I just wanna make sure these are done correctly, they would be a bitch to strip if they got messed up.

[Power_Man]

All aluminium needs to be pre baked. Especially if it has been in contacts with oil.

May turn black after baked, sand blast again and bake again.

 

It will "fish-eye" as the oil/air escape the metal.

[sleeper06]

Pre bake is a must as stated , blasted, baked , blasted , hot tank powder , keep in mind I'm not a powder guy just was allowed to use someone's equipment i. It's about 9 yrs old and holding strong

[Power_Man]

Pre bake is a must as stated , blasted, baked , blasted , hot tank powder , keep in mind I'm not a powder guy just was allowed to use someone's equipment i. It's about 9 yrs old and holding strong

I'm not a full time powder guy, but was told if you sandblast after baking, you strip down to new material and can cause opportunity for it to out-gas on your powder bake. thats why i suggested a bake after your second sandblast.

[Larry's Shee]

Would this apply to paint also?

What temps and for how long ?

[Power_Man]

Would this apply to paint also?

What temps and for how long ?

It wouldn't hurt to get the oil burnt off for paint.

 

For me, I go by:

If the powder needs 350* bake. I'll pre-bake the part at 400* for 30min to an hour.

Better safe than sorry. Powder is a bitch to get off, unless you have a really good chemical stripper.