Ukuqhuma kothuli kungena ngaphansi kwesigaba sokuqhuma kwamakhemikhali.
Izinto ezihlukahlukene, kuhlanganise magnesium powder, i-aluminium powder, ukudla kwegazi, ukudla kwenhlanzi, ukolweni, isitashi, ukotini, nogwayi, zisengozini yokuqhuma kothuli.