Black karfe bututushi ne karfen da ba a rufe ba kuma ana kiransa da baki karfe.Launi mai duhu yana fitowa daga ƙarfe-oxide da aka kafa a saman sa yayin masana'anta.Lokacin da aka ƙirƙira bututun ƙarfe, ma'aunin baƙin ƙarfe oxide yana buɗewa a samansa don ba shi ƙare wanda aka gani akan wannan nau'in bututu.

Galvanized karfe bututushi ne karfen da aka lullube shi da karfen karfen zinc.A lokacin galvanizing, karfe yana nutsar da shi a cikin narkakken wankan tutiya, yana tabbatar da tauri mai kauri mai kauri.An rufe bututun galvanized da kayan zinc don sanya bututun ƙarfe ya fi tsayayya da lalata.

Bambancin kamanni
Babban manufar bututun baƙin ƙarfe shine ɗaukar propane ko iskar gas zuwa gidajen zama da gine-ginen kasuwanci.Ana kera bututun ba tare da dunƙulewa ba, yana mai da shi bututu mafi kyau don ɗaukar iskar gas.Hakanan ana amfani da bututun baƙin ƙarfe don tsarin yayyafa wuta saboda ya fi jure wuta fiye da bututun galvanized.Babban amfani da bututun galvanized shine ɗaukar ruwa zuwa gidaje da gine-ginen kasuwanci.Zinc kuma yana hana gina ma'adinan ma'adinai wanda zai iya toshe layin ruwa.Galvanized bututu yawanci ana amfani da shi azaman firam ɗin ƙira saboda juriya ga lalata.

Bambance-bambance a cikin matsaloli
Zinc ɗin da ke kan bututun galvanized yana kashe bayan lokaci, yana toshe bututun.Lalacewa na iya sa bututun ya fashe.Yin amfani da bututun galvanized don ɗaukar iskar gas na iya haifar da haɗari.Baƙin bututun ƙarfe, a gefe guda, yana lalata da sauƙi fiye da bututun galvanized kuma yana ba da damar ma'adanai daga ruwa su taru a cikinsa.