Ya, those look ugly from a corrosion standpoint. You can somewhat easily deal with the exterior exposed surfaces, but the surfaces inside the crimped lug will be a severe problem. And they look to already be rusting.
Originally Posted by major
Among other reasons, yes. Ferrous metal will become magnetized with current flow through it and attract other bits of metal possibly causing a short circuit or ground. And then the whole thing about corrosion
Seriously, steel becomes significantly permanantly magnetized from current flow? Seems like the permanent magnetic field can't be anywhere as strong as the one created while the current is flowing and I haven't heard that EVs have a problem with that.
I would hope that there aren't enough iron bits flying around to cause a short circuit. If there are, he's got worse problems.