isikhwama esikhulu
Iphrofayile yezinto ezingenakuchithwa yindlela engeyona yokuqondisa okuqondiswayo kakhulu ekuseniweni, ukwenza nokusebenza kwamakhemikhali. Le nto ngemigaqo yesikweletu enezimalini ezingaphakathi nezibophelo ezingafani, eqinisiwe ngokunqanqwa ngokupheleleyo noma ukulaywa ngokupheleleyo. Iphrofayili zokwenza izinto ezingenakuchithwa ziqinisiwa ngokuthenga kwezinto ezingenakuchithwa ezinhle, okungenani kuzokwenzela ukuba kune chromium ne nickel, okunikeza ukuphepha kakhulu kwekuchithwa, ukuphepha kwe-oxidation, nokutholwa kwezinhlelo. Lezi zinto zinezimalini, izigaba, nezindlela ezahlukahlukene ukwesekela izidingo zokusebenzisa. Inkqubo yokwenza kuyiqinisekisa ukuba kunezindlela ezifanayo zokusebenza ngokupheleleyo kuzo zonke izinto, kanye nezindlela ezinhle zokuthanda, ukupheleka, nokwakhiwa kwezimalini. Zizokuphepha ukupheleka kwezinto ngokubaluleka kakhulu kwezimalini kanye nokwakha nezindlela ezinhle. Zisebenza ngokuba yizinto eziphambene kakhulu ekuseniweni kwezakhiwo, ukwenza amadivayisi, ukuthuthwa kwezimalo, nezinye izisebenzelo zokusebenza kwamakhemikhali. Izici zomkhiqizo zokuthi kuyisisekelo sokuthi kunezimalo ezingenakuchithwa, izinhlelo, noma ukuthanda okupheleleyo kakhulu kuzokwenzeka.