Chemical Compatibility For Chrome

This: Use of Chlorine Dioxide in the Brewing Industry says it etched chrome plated steel.

Fantastic!! Thanks for the help!

Looks like Hasteloy C is the best bet.

I've come to pretty much the same conclusion. Hastelloy C or titanium seems to be the best material options, just a very costly one.

I'm dealing with a fairly weak solution (~80 mg/L). One of the vendors I'm looking at uses chrome plated parts and backs up this equipment for my situation. It would provide a significant cost savings to my client if it will work. I'm just not the type to take a vendor at his/her word (even if it is backed by warranties, guarantees, etc).

It may be time to include the client in the decision making process.

I was eng. manager for a company that built circuit board developers, etchers, strippers and coaters. We dealt with every noxious chemical and acid you can name.

Our customers demanded the best materials we could offer. Many of these machines ran 24/7 during big production runs. Having to stop production to change a fitting or other minor part was unthinkable to them. You may have the same issue, I don't know.

At least keep your customer informed.

Goood luck.

That's great advice as well. It's something I always try to do and usually not as much as I should.

Thanks for the help and advice.

Does it need to be a metal? As I see it, fluorid based plastics ought to be resistant to chlorine compounds. A hint. Check it out.

You're right with regards to fluoride based materials having good resistances or at least you're inline with all the charts I have. From my standpoint it doesn't need to be metal. I simply want to specify something that will last. Without getting into the project details, I have 3 options so far.. listed from lowest price to highest.... Chrome, a fluoroelastomer, and titanium. There are huge differences in prices between all.

I have a wealth of information on material compatibilities for chlorine dioxide, unfortunately none of them have chrome them...

PVDF?

If plastics is what you're looking at- PVDF,PFA,ECTFE

Chrome is usually used as chromic acid or Chromate salts which are strong oxidants.

Chlonine dioxide being again a powerful oxidizing agent, what you can expect is a powerful exothermic reaction between chrome & Chlorine Dioxide, just because of the fact that two oxidizing agents tend to nullify/ suppress each other.

Hence the compatibility question between Chrome & Chlorine dioxide is not a favourable one.

The other way is to do it your self & find out.

Glass, quartz glass, suitable ceramics? Maybe running the reaction in a stream not in contact with the enclosure. Maybe relocating the facility to outer space, where the enclosure(s) can be entirely disposed with. Some simple ideas.