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Subject: Re: [DCHAS-L] alternative etchant for metal samples

Date: Jun 8, 2021 17:53 UTC

Author: Yaritza Brinker <YBrinker**At_Symbol_Here**FELE.COM>

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Subject: Re: [DCHAS-L] alternative etchant for metal samples

Date: Jun 8, 2021 21:11 UTC

Author: davivid <davivid**At_Symbol_Here**WELL.COM>

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From: Joseph Smith <information**At_Symbol_Here**CANAVERALLABORATORIES.COM>

Subject: Re: [DCHAS-L] alternative etchant for metal samples

Date: Jun 8, 2021 18:44 UTC

Reply-To: ACS Division of Chemical Health and Safety

In-Reply-To: Re: [DCHAS-L] alternative etchant for metal samples

Demystify: 

In Philly they load HF into paint pens and use it for Graffiti on Glass surfaces. They mangled up some very expensive sculptures, glass doors, train windows and more with that.

Joe Smith



On Tue, Jun 8, 2021 at 1:56 PM Yaritza Brinker <YBrinker**At_Symbol_Here**fele.com> wrote:

I'm glad to see work happening on this area.

HF has been unavoidable in metallography. Particularly with aluminum alloys where practically all standard etchants call for it and it's often used in combination with concentrated HCl and HNO3. Picric is another acid that is hard to avoid in metallography.

It would be great to see more safer etchants developed and added to industry test standards so that their use can extend outside of academia where labs are bound by a2La accreditation rules.

Keep up the great work!

Yaritza Brinker

260.827.5402