Huey Test and IGC

[limesh M]

Dear All,

 

What is Huey test ?

 

Huey test and intergranular corrosion test as per ASTM A262 are same or not ?

 

How we are finding the Intergranular corrosion?

 

What is the acceptance criteria?

 

 

Regards,

 

Limesh

[Raghuram Bathula]

ASTM A 262 Practice B is also called as streicher, Practice C is Huey, and Practice E is called as Strauss test. Type of test required and acceptance criteria should be stated by process designer depending on application

[hpi001]

Dear Limesh,

As already mentioned by Mr. Raghuram Bathula you have several tests
according to ASTM A262. All are related to inter-granular attack but
in different environments. Find below the solutions, test time and
acceptance criteria for your info. Be aware that for Practice B and C
the max. allowable corrosion rate should be specified by your client.

Practice B (Streicher) = 1 x 120 hours Boiling Ferric Sulfate–Sulfuric
Acid Test Solution, acceptance criteria is corrosion rate in mm/month
Practice C (Huey) = Standard 5 x 48 hours - Boiling Nitric Acid Test
Solution (sometimes also 1 x 48 hour + 1x 96 hour is used), acceptance
criteria is corrosion rate in mm / month
Practice E (Strauss) = Standard is 15 hours - Boiling Acidified Copper
Sulfate Test Solution (if required also 48 or 72 hours can be used),
acceptance criteria are cracks in the specimen after three point bend
test.

Best Regards,

Herman Pieper

On 18 sep, 12:32, limesh M <limes...@gmail.com> wrote:
> *Dear All,*
> **
> *What is Huey test ?*
> **
> *Huey test and intergranular corrosion test as per ASTM A262 are same or not
> ?*
> **
> *How we are finding the Intergranular corrosion?*
> **
> *What is the acceptance criteria?*
>
> Regards,
>
> Limesh

[limesh M]

Dear Herman Sir,

 

Thank you for the valuable information .I need some clarification on the following lines.

 

"Practice C (Huey) = Standard 5 x 48 hours" , what is this 5? 5 pieces of test specimen or any other item?

 

"Practice E (Strauss) = Standard is 15 hours - Boiling Acidified Copper
Sulfate Test Solution (if required also 48 or 72 hours can be used),
acceptance criteria are cracks in the specimen after three point bend
test."

 

Acceptance criteria are cracks or no cracks?If answer is cracks,then what is the logic behind that?

 

Please clear my dobts.

 

 

Regards,

 

Limesh

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[hpi001]

Hello Limesh,

For Practice C : 5 x 48 hours means one sample which need to be tested
for 5 periods of 48 hours. After every single period the test solution
need to be refreshed and the samples weight need to be measured.

For Practice E: Acceptance criteria --> cracks present in the specimen
after bending (visible with eye and/or microscopic) are not
acceptable. Only small cracks started from the specimens corners may
left outside the examination. By bending the specimen you can prove
that grain boundaries are not affected due to corrosion.

Hope this clears everything a little bit more.

Best Regards,

Herman