Lokacin sarrafa bututun da ba su da kyau a masana'antar bututun ƙarfe maras sumul, ana amfani da pickling. Pickling wani abu ne da ba dole ba ne a yawancin bututun ƙarfe, amma bayan dasa bututun ƙarfe maras sumul, ana kuma buƙatar wanke ruwa.

Hattara yayin wanke bututu maras sumul:

1. Lokacin da aka wanke bututu maras kyau, yana buƙatar aiwatar da shi a cikin tankin ruwa mai ɗorewa, don guje wa gurɓataccen gurɓataccen abu. Lokacin wankewa, bututun ƙarfe mara nauyi yana buƙatar nutsewa gaba ɗaya cikin ruwa. A wannan lokacin, sai a sassauta majajjawa a ɗaga sama da ƙasa sau uku Har sau huɗu.

2. Lokacin da aka wanke tube maras kyau tare da ruwa, wajibi ne a tsaftace ruwan a cikin bututun ƙarfe don kauce wa lalata ruwa da oxidation na bututun ƙarfe. Saboda haka, yana da matukar muhimmanci a aiwatar da sauran ƙarfi da wuri-wuri.

3. Lokacin da aka wanke bututun da ba shi da sumul da ruwa, ya kamata a lura cewa ba zai iya haye tankin da ake dannewa ba don guje wa haɗari, zamewa ko faɗowa cikin tankin acid ɗin kuma ya lalata shi da ragowar hydrochloric acid.

4. Lokacin da aka wanke bututu maras kyau da ruwa, dole ne a sarrafa ma'aunin gishiri na baƙin ƙarfe a cikin wani yanki na musamman, kuma ba zai iya wuce misali ba, in ba haka ba za a iya lalata bututun ƙarfe maras kyau.