The example given is for E6013 electrodes which will have some cellulose but primarily consist of inorganic minerals. Far different than the high cellulose E6010 or E6011 electrodes. One should also remember that E6013 was originally designed for sheet metal welding and therefore has a soft, very shallow penetrating arc, and a very fluid slag. This electrode is typically prohibited for use in pressure vessels and piping by knowledgeable customers/manufacturers – too many problems with cold lapping, lack of penetration and slag inclusions.
ASME ScII Part C has the following recommendations for holding and drying:
At least three issues/problems exist with drying or storing high cellulose electrodes (E6010/E6011) at elevated temperatures.
1) Since these electrodes produce copious amounts of hydrogen when the cellulose (hydrocarbon) breaks down (or burns) in the arc, the small addition of hydrogen through absorbed moisture is inconsequential
2) Putting these electrodes through drying or storing in heated rod ovens can result in coating breakdown, spalling, decohesion and blistering while welding etc. In fact too high a temperature can result in charring.
3) Drying out the coating can also result in arc stability issues. For those who know some old welders who used this stuff at lot, you will find a common trick when the arc was "misbehaving" was to briefly immerse (dunk) the electrodes in water - smoothed the arc right out (at least as far as these electrodes can be).
E6010 and E6011 electrodes are best stored in their original packaging in humidity controlled conditions at ambient temperatures. Kept just dry enough to prevent any rusting of the core wire.
Enjoy
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Hareesh K V
Sent: Friday, October 07, 2016 12:45 AM
To: materials-welding
Subject: Re: [MW:25500] Cellulose electrode redrying
Dear All,
Please see the attached photos.
There is a correction. Heating of 110 deg C for half hour is needed.
Regards,
Hareesh K V
+91-8547859202
On 6 Oct 2016 10:32 p.m., "Hareesh K V" <hareesh13h@gmail.com> wrote:
Dear all,
Please see and follow the recommendation from the manufacturer.
Please refer the packet of E6013, you can see that 15odeg C heating is recommended.
Regards,
Hareesh K V
+91-8547859202
On 6 Oct 2016 8:58 p.m., "Roy Joseph" <royjoseph04@gmail.com> wrote:
Cellulosic electrodes works better with 2-5% moisture in it.So re drying is not advised.
Regards,
Roy Joseph,
Oman
On Mon, Oct 3, 2016 at 10:13 AM, Pravin G <htcispravin@gmail.com> wrote:
Dear expert,
Can anyone advice why cellulose electrode don't need redrying? Any particular Technica reason?
Pravin Poornachandran
Sent from my iPhone
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