C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

DIY black phosphate

Thread Tools
 
Search this Thread
 
Old 06-07-2015, 01:30 AM
  #1  
dugsgms74
Burning Brakes
Thread Starter
 
dugsgms74's Avatar
 
Member Since: Mar 2014
Location: Crestline CA
Posts: 904
Likes: 0
Received 46 Likes on 40 Posts

Default DIY black phosphate

This might be old news but was proud of my self so I decided to post this. So I bought a vibratory cleaner awhile back and it works great. Only problem is that it takes the plating/finish off as well as the dirt/rust.

Wanted to redo the black phosphate finish on the hood latch plate bolts that took a run through the cleaner and talked to a couple of people about doing so. Was given 4 options, 1.have someone do it for you, 2. buy a kit from Caswell plating 3. buy a kit from the local gun shop 4. buy a kit from Radio shack for PC board making. Did a bit more research and found that all these kits are basically just acid.

Decided to try to do it myself with readily household available items. Tried a few things but came up with CLR as the winner. Takes a few soakings with wipe down in between but actually works pretty good. Here is pic of a bolt right out of the cleaner next to one with a CLR black phosphate job.
Attached Images  
Old 06-07-2015, 01:41 AM
  #2  
JC68
Racer
Support Corvetteforum!
 
JC68's Avatar
 
Member Since: Nov 2014
Posts: 463
Received 129 Likes on 105 Posts
Default

Looks pretty good. How long did you have to soak it?

John
Old 06-07-2015, 03:23 AM
  #3  
dugsgms74
Burning Brakes
Thread Starter
 
dugsgms74's Avatar
 
Member Since: Mar 2014
Location: Crestline CA
Posts: 904
Likes: 0
Received 46 Likes on 40 Posts

Default

Thats probably the bad side of using the CLR, not a very strong acid so takes awhile. This took 24 hours but I think my soak times were way too long. Basically needs to soak for a couple hours them rinse and brush off w/ a tooth brush and repeat. The first time you take it out and rinse it off nearly all of the black comes off, each additional time a little less comes off until nearly nothing comes off. I'll have to try it again but I'd be willing to bet that 3 two hour soaks would give the same results.
Old 06-07-2015, 08:54 AM
  #4  
Alan 71
Team Owner
 
Alan 71's Avatar
 
Member Since: Sep 2006
Location: Westminster Maryland
Posts: 30,173
Likes: 0
Received 2,878 Likes on 2,515 Posts

Default

Hi d,
Looks good!
Are you going to try to coat it with anything?
I've found that if you don't protect it in some way the black turns brownish in some areas of the part after a couple of weeks.
Even dipping in with something like WD40 seems to stop that.
Regards,
Alan
Old 06-07-2015, 06:44 PM
  #5  
dugsgms74
Burning Brakes
Thread Starter
 
dugsgms74's Avatar
 
Member Since: Mar 2014
Location: Crestline CA
Posts: 904
Likes: 0
Received 46 Likes on 40 Posts

Default

Thanks Alan, WD-40 is what I ended up using, thought about satin clear paint but was worried it would change the finish.

Get notified of new replies

To DIY black phosphate




Quick Reply: DIY black phosphate



All times are GMT -4. The time now is 11:00 PM.