Reg - Etchant for Aluminum material

[anand babloo]

Dear Experts,

I need certain Aluminum weld samples to be Macro etched .

The grades of Aluminum are ALU 5052 & ALU 1050.

Kindly advice me that which etchant has to be used to reveal proper weld fusion.

Thanks in advance :)

Awaiting experts advice.

With regards,

R.Anand Raj

CSWIP 3.1 Welding Inspector

ASNT LEVEL II 

[Harish Kannepalli]

Use 10% NaOH

Harish Kumar

--
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-weld...@googlegroups.com.
To post to this group, send email to material...@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CACcgZYiij0BgmzV4TQeMOJvogBHDh3dM0nkESHTcCkngywmj2A%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

[c sridhar]

The following etching reagents and directions for their use are suggested for revealing

the macro structure.
Aluminum and Aluminum-Base Alloys

        Hydrochloric acid (concentrated) 15 ml
        Hydrofluoric acid (48%) 10 ml
        Water 85 ml

This solution is to be used at room temperature, and etching is accomplished by either

swabbing or immersing the specimen.

U cane also refer to following:

Etchant	Conc.	Conditions	Comments
Kellers Etch Distilled water Nitric acid Hydrochloric acid Hydrofluoric acid	190 ml 5 ml 3 ml 2 ml	10-30 second immersion Use fresh	For most aluminum and aluminum alloys
Methanol Hydrochloric acid Nitric acid Hydrofluoric acid	25 ml 25 ml 25 ml 1 drop	10-60 seconds	Pure aluminum, aluminum-magnesium, and aluminum-magnesium-silicon alloys
Krolls Reagent Distilled water Nitric acid Hydrofluoric acid	92 ml 6 ml 2 ml	15 seconds	Aluminum-copper alloys

C Sridhar.
Technical Adviser - Welding,
for Alsta Pristine Engineering Private Limited,. Bangalore
( SS, AL fabricators & A venture of Advance Eng. Training & Inspection Services). Chennai,

Mobile nos: 0 94449 71097, 0 7406 326326, 0 94445 21267.

Please don't print this e-mail unless you really need to. Save the environment.

---

 

---

From: anand babloo <brav...@gmail.com>
To: material...@googlegroups.com
Sent: Wednesday, 25 March 2015 12:53 PM
Subject: [MW:23002] Reg - Etchant for Aluminum material