How does iron oxide accelerate cyanoacrylate glue curing?

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A discussion on superglue accelerants highlights the effectiveness of a mixture of bicarbonate and graphite, with some users noting that iron oxide derived from burning steel wool may outperform this combination. The conversation delves into the chemical properties of these additives, particularly the alkaline nature of bicarbonate, which is believed to facilitate the acceleration process. There is curiosity about the role of iron oxide, questioning whether its effectiveness stems from the extra oxygen or the iron itself. It is noted that hydroxyl ions from atmospheric moisture initiate the glue's solidification, and both bicarbonate and iron oxide can absorb water, potentially speeding up the curing process. A reference to a Veritasium video on this topic is also mentioned, suggesting further exploration of the subject.
bland
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I was perusing superglue accelerants like bi carb and graphic or a mix of the two, and other additives, and it appears that a mix of bi carb and graphite works the best. However I eventually came across a single vid that used iron oxide made from burning steel wool, as the additive and it appeared to be superior to bi carb and carbon.

I have heard that it is the alkaline nature of bi carb that acts as the accelerant but now I am curious as to the chemical reason that iron oxide also works. Is it just the extra oxygen, or does the iron itself have something to do with it.
 
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Iron(III) oxide will react with acids, so by definition it is a (weak) base, it just won't dissolve in water in the Fe2O3 form. Also, post the videos you are referring to. This way we can avoid guess work and incorrect interpretations.
 
bland said:
I have heard that it is the alkaline nature of bi carb that acts as the accelerant but now I am curious as to the chemical reason that iron oxide also works. Is it just the extra oxygen, or does the iron itself have something to do with it.
Hydroxyl ions from the water in the air is the initiator of the chain reaction to solidify the glue.
Bicarbonate, and iron oxide, should absorb water from the air. The greater abundance of initiators would make for a quicker glue set.

it so happens that I had just viewed a video by Veritasium earlier today on this type of glue.
 

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