Zinegar on my 16"
I am knowingly taking the longest route to clean my vintage Zildjians.
But after the 90 minutes of athritic irritation, I began to consider the alternative.
I looked into the Muriatic Acid suggestion by reading everything I had time to read.
The following is my opinion based on what I read.
I feel pretty confident that Muriatic Acid is the fastest way, may be the only, to completely remove the tarnished spots.
From what I understand, muriatic acid is hydrochloric acid, a lower quality grade form available in retail stores and sold as an asphault cleaner. The process to clean asphault is to wet the surface and cut the solution to with 20 parts water because it is highly caustic. The warning list is long... Do not get it on your skin. Do not breath it. etc, etc.
Even as a fireman,the more I read, the more I became concerned. I have access to all the protection gear I would possibly need, including SCBA. It was not about protecting myself. I started to think that buying two gallons of this stuff (as it is packaged) would put me in a position of having alot of unused product. I did find a friend with a friend who could point me to where I could find smaller quantities.
The chemical reaction of muriatic acid on brass will remove the tarnish. But it can also weaken the metal. I read that Muriatic Acid is used to break scrap brass (an alloy of copper and zinc) down into copper.
There was an interesting discussion about the pros/cons of using the acid to clean shell casings and warnings about its use.
I am sure there is a point in the chemical reaction when the alloy weakening begins. Any point before that, you would be fine, any point after, the door opens for cracks especially when you bang on it with a stick or ignite gun powder in it.
Finally, I read that removing all the acid was not easily accomplished with water. It should be neutralized and baking soda was recommended.
The chemical reaction is what I needed to remove the tarnish but not to negatively impact the molecular structure of the brass alloy.
All things considered, my next step was to experiment with vinegar.
My tools included a gallon of white vingegar, an old windex bottle, a large bottle of table salt, a sponge and a wash tub.
I took pictures in between the following applications...
First application, vinegar was sponged liberally onto the cymbal and rubbed on the darkest of spots before rinsing with water.
Second verse, same as the first.
Third application vinegar was sprayed on and allowed it to sit for 5 minutes, then rinsed with water.
Forth application vinegar was sprayed on the and allowed it to sit for 5 minutes, then sprayed on again, then using the sponge, rubbed the darker spots. The scrub side of the sponge was used on a couple black spots which lightened them but not much. More vinegar was appled and allowed to sit another 5 minutes and then rinsed with water.
Fifth application was a much longer soaking. I sprayed and let it sit for 2 hours and rinsed.
The sixth time, I soaked again for 15 minutes and then applied salt and vinegar to the sponge and scrubbed the tarnished areas.
And that concludes todays efforts.
There is still tarnish around the edge.
Here are the photos of the progress.