/ how do you store your welding rods (7018) #31
When I've finished welding, can I simply return unused rods to the air tight container until next time, or will that "spoil" the others, so should I be putting them in an oven first ?
I can give you a data point for RG45 rod. I tried keeping it in an airtight container and after one year it was covered with so much corrosion I couldn't use it. Our weather here is very hot and humid in summer and really cold in winter. So I think think the problem is that when I open the container, moist air gets in. And then when the temperature changes the moist air can't get out of the container, so it condenses on the rods and they corrode. I've solved my problem by putting desiccant in the airtight container, and trying to be careful when and where I open it. In the hot humid summer, I go into the air conditioning where the air is relatively dry to open the container, take out a rod, then close it up. In the winter, I make sure I don't open the container unless the air is colder than the rods.
I think you have an added complication with electrodes because the flux absorbs water when it's out in the air and acts like a sponge, and if you put it back in an airtight container, it releases that moisture to the drier air and raises the humidity in the container. So I think you're on the right track about drying them out before putting them back in the container.