Dear Pravin,
The most important feature of cellulosic type electrode ( E-6010) is ,it's deep penetration arc , which made them first choice for pipe line root pass welding.
Cellulosic electrodes contain a large proportion of cellulose(wood flour- over 30%) .Moisture content of these electrodes is quite high. While cellulose burns in the arc to form a gas shield of carbon monoxide & dioxide , in conjunction with the moisture in the coating, produces a large amount of hydrogen(30 to 45ml hydrogen/100gm weld metal)
The hydrogen raises arc voltage and gives the electrodes their characteristics of deep penetration and high deposition rates.
Baking the cellulosic electrode will reduce deep penetration efficiency and hence not recommended in general .
Best Regards,
JIJILAL K.M.
QA/QC Manager,
Thai Jurong Engineering Ltd,
KCE SPP Project,Thailand
On 3 October 2016 at 13:13, 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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