Eh all metals like to burn, which is why so many are found as oxides in nature. For example, a "thermobaric lance" used to punch holes through reinforced walls

Eh all metals like to burn, which is why so many are found as oxides in nature. For example, a "thermobaric lance" used to punch holes through reinforced walls is just a bunch of iron metal burning in excess oxygen, the colors in fireworks are diverse metals, etc. It's an example of "kinetically driven" versus "thermodynamically driven" in that metals all want to burn and give off tons of heat, but in everyday human circumstances the ambient temperature is cold enough to prevent the metaphorical ball from rolling down the hill. It's rather surprising that any metals at all can withstand the remarkably unhappy oxidizers used in modern rocket fuels! Probably the metal part in contact is an oxide layer that's easily abraded by big chunks of crap.