Powder coat question

[Dedtruk]

Powder coating is impervious to lacquer thinner once the powder coat has been baked on in an oven, correct?

My understanding of powder coating is that it can't be removed with solvents after it has been cured in an oven. It's essentially a baked-on plastic, IIRC. My sandblaster alleges he powder coated my frame, except I can strip the "coating" right off with lacquer thinner in a few seconds. Before I confront him, I want to be sure I'm correct that powder coating can't be stripped with solvents. I appreciate your help, thanks!

 

[Oakley40]

For what it's worth according to a powder coating Wiki Powder coating - Wikipedia, the free encyclopedia "Methylene Chloride is generally effective at removing powder coating, however most other organic solvents (Acetone, thinners, etc.) are completely ineffective. This quote is on the bottom of the page.

I sort of remember it being described as a newer technology of baked enamel, which thinners will not remove, neither will methylene chloride (Jasco).

Hope this helps...good luck with your coater

 

[DanS HJ-45]

Can you find any parts that were masked off for coating? If so, post up some good close up pictures.

Generally, powder coat is pretty much not affected by solvents. What you are describing sounds completely wrong for powder coat.

Even if it's a bad PC job, with oily metal that wasn't outgassed, it won't rub off with thinner. It'll flake off in big chunks.

Dan

 

[antFJ]

x2 mine has flaked but solvent wont touch it

 

[Dedtruk]

For what it's worth according to a powder coating Wiki Powder coating - Wikipedia, the free encyclopedia "Methylene Chloride is generally effective at removing powder coating, however most other organic solvents (Acetone, thinners, etc.) are completely ineffective. This quote is on the bottom of the page.

I sort of remember it being described as a newer technology of baked enamel, which thinners will not remove, neither will methylene chloride (Jasco).

Hope this helps...good luck with your coater

Thanks ... I didn't think to look on Wiki until after I posted. I'll check it out.

I don't have any pics at the moment, but no, it didn't flake off, it looked fine. No parts were taped off prior to coating. I simply ran a tap through threaded holes I needed to open back up.

The sandblaster/coater didn't clean the inside of the frame as I had asked. Having discovered that, I cleaned it as best I could myself in preparation to paint it with POR 15 on the inside of the frame. I was going to tape the holes in the bottom of the frame closed prior to POR 15, so I wiped the bottom of the frame with lacquer thinner to remove any oil, dirt, etc. The "powder coat" got tacky and soft immediately, and can be removed down to the metal with only a few seconds of effort at rubbing. It appears that the sandblaster/coater has attempted to rip me off ... Thanks for your input!

 

[fj404life]

Does not sound like powdercoating to me...sounds more like rustoleum paint or?

 

[fieldsken1]

the pc would have gone inside the frame also

 

[vtcruiser60]

Thanks ... I didn't think to look on Wiki until after I posted. I'll check it out.

I don't have any pics at the moment, but no, it didn't flake off, it looked fine. No parts were taped off prior to coating. I simply ran a tap through threaded holes I needed to open back up.

The sandblaster/coater didn't clean the inside of the frame as I had asked. Having discovered that, I cleaned it as best I could myself in preparation to paint it with POR 15 on the inside of the frame. I was going to tape the holes in the bottom of the frame closed prior to POR 15, so I wiped the bottom of the frame with lacquer thinner to remove any oil, dirt, etc. The "powder coat" got tacky and soft immediately, and can be removed down to the metal with only a few seconds of effort at rubbing. It appears that the sandblaster/coater has attempted to rip me off ... Thanks for your input!

No, this does not sound right for PC at all. It sounds like it is paint, not powder coat paint. All powders have different cure temps, if not cured at temperature for the right amount of time, I suppose solvents could soften it down, but I doubt it. Honestly, I have a very hard time stripping PC on aluminum or steel parts, even in my sandblaster. I need to use a chemical stripper repeatedly. So...dissolving the coating on your frame with solvents seems way wrong.

Fieldskin is right as well...some PC should have migrated inside your frame as well. I would be suspect if there was nothing in there.

 

[Dedtruk]

Some of the coating, whatever it is, did get inside the frame but it was just sitting on top of the dirt/grease mixture the sandblaster didn't get. It was clearly visible through the holes on the inside of the frame and I just scraped it off with a fingernail. That's how I discovered the inside of the frame wasn't clean. I spent a lot of time cleaning the inside before I dropped the frame off at the sandblaster/coater and even more time after I discovered the half-a$$ed job the company did. And now the frame has flash rust in the seams and other spots that were missed. So I'm going to take digital photos of all the mess and discuss with the company owner and see if he makes good.

I agree, that coating is just regular paint, and that isn't what I bargained or paid for. Thanks again for the input guys, I really appreciate it.

 

[DanS HJ-45]

Some of the coating, whatever it is, did get inside the frame but it was just sitting on top of the dirt/grease mixture the sandblaster didn't get.

Definitely not powder then. Powder will only stick to conductive materials. If there's a speck of grease when I powder coat the powder sort of avoids that spot entirely, leaving a little halo around it. Then, when the powder bakes, the grease gets all "melty" and runs all over and makes a mess.

Sorry to hear that happened to you. Hopefully the owner of the company makes it right.

Dan

 

[Airmech404]

Can you find any parts that were masked off for coating? If so, post up some good close up pictures.

Generally, powder coat is pretty much not affected by solvents. What you are describing sounds completely wrong for powder coat.

Even if it's a bad PC job, with oily metal that wasn't outgassed, it won't rub off with thinner. It'll flake off in big chunks.

Dan

I see lots of people here saying Acetone won't remove powder coating. Have any of you ever touched acetone to Powder Coat? It doesn't sound like it. I can personally confirm that Acetone WILL damage and or remove powder coat immediately. Unless there is another type that is resistant which I am ignorant of then you are completely wrong and giving incorrect information. IvI' even spoken to powder coaters who confirm that both Acetone and lacquer thinner will quickly and easily remove powder coat.

 

[bikersmurf]

Shouldn't the grease be cooked from the oven?