Ua hoʻōki ka hui Korea Hema ʻo POSCO i ka hana ʻana i ka piʻi ʻana o ke kumukūʻai nickel ma muli o ke ahi…
Aia ka chromium i loko o ke kila kila, ka mea e hāʻawi ai i ke kūpaʻa i ka pala i nā mahana kiʻekiʻe. Hiki i ke kila kila ke kū i nā wahi ʻino a i ʻole nā ​​​​​​kemika ma muli o kona ʻili laumania. Loaʻa i nā huahana kila kila ke kūpaʻa maikaʻi loa i ka pala a me ka luhi, palekana no ka hoʻohana lōʻihi.
ʻO ka Pepa Kila Kila ʻO Yieh Corp. kahi mea wili kaulana loa e hāʻawi ana i ke kūpaʻa maikaʻi i ka pala no nā noi he nui. Hoʻohana nui ʻia nā pepa kila kila i nā lako o loko, nā paia, nā ipu kaomi a me nā noi kai. He kūpono ka papa kila kila 430 no nā lako maloʻo a i ʻole nā ​​​​​​lako o loko. He kūpono ka papa kila kila 304 no nā paia o waho a i ʻole nā ​​​​​​puka makani. He kūpono ka papa kila kila 316 no nā ipu kaomi i nā ʻano ʻoihana a me ke kai.