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u/akla-ta-aka

r/materials r/Welding r/CapeCod r/homechemistry r/redneckengineering
▲ 15 r/homechemistry

Possibly useful website for synthesis

I came across a website called PrepChem today that looks like it might have some useful info on procedures for preparing reagents. I went through a few chemicals that I know the methods for synthesizing them and the results looked mostly fine. It's definitely a case of buyer beware because there were a few that had so little info as to be useless but others had a good deal of info and they all appear to reference the source material.

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u/akla-ta-aka — 1 month ago
▲ 72 r/materials

Getting Li-ion anode material to behave for XRD

I thought some of you might appreciate this. We’re doing XRD on a candidate anode material and want to protect it from air. These XRD sample holders use kapton tape to seal in the sample under an argon atmosphere. They can then be handled without special conditions in the XRD.

u/akla-ta-aka — 2 months ago
▲ 2 r/CapeCod

How bad are the bugs at the knob?

We were thinking of going out there but I remembered people talking about how bad the flies have been.

Has anyone been over there recently?

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u/akla-ta-aka — 3 months ago
▲ 77 r/Welding

MIG Push vs Drag

This is my first time running MIG instead of fluxcore and I’ve been trying to dial in my settings on some scrap steel. I’ve noticed a few differences so far but one is particularly standing out. That is the end of the bead.

I was under the impression that pushing is preferred to dragging for MIG. But I’m getting a big crater at the end of the bead when pushing (first two pictures) vs dragging (last two). I realize now that I need to stop for a bit at the end of the bead before releasing the trigger, but I am still curious why there such a difference? I’ve tried to keep the torch angle the same for both.

I’m open to any other comments on the welds. Such as whether it’s normal to get that much oxidation on the base metal after running a short bead. I’m going to try some fillets instead of stringers next.

I was running ER70S-6 0.03 wire, 20 CFH 75/26 gas.

u/akla-ta-aka — 5 months ago