Re: [MW:24433] Re: How to protect Serration of Flanges during Hot dip galvanization

Removing galvanizing:

Try using 50% dilute HCl, dip your part in it till the bubbling stops, then wash off / rub off with baking soda.

Vinegar also is useful. 

But take care not to inhale fumes.

 

BR,

Shashank C Vagal 

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From: Perumal Govindan <perumalgovindan@gmail.com>
To: materials-welding@googlegroups.com
Sent: Friday, 4 March 2016 7:56 AM
Subject: Re: [MW:24429] Re: How to protect Serration of Flanges during Hot dip galvanization

Hi
I am forgetting the cheminal name, which will be applied on the serrated surface before HDG bath, once done it will be cleaned to recover the serration.

Requested to contact the HDG agencies for more details.

With kind regards
Govindan
Kuwait

On 11 Feb 2016 07:00, "Hamid Jabbari" <lifebod@gmail.com> wrote:

Does any one know how could i remove the hot galvanized coating from face of flange?
plz advise

On Monday, August 23, 2010 at 1:08:56 PM UTC+4:30, aly mhaskar wrote:

Dear All, Presently we are doing hot dip galvanization of pipe spools where we have to protect the serration of flanges during galvanization.   Can any body suggest what can be applied on serration to protect it from adhesion of ZINC on serration.   Thank you in advance.   Mhaskar Aly Kuwait

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