Duk da cewa tabon ajiya mai danshi ko kuma 'farin tsatsa' ba kasafai yake lalata ikon kariya na rufin galvanized ba, amma wannan wata matsala ce ta kyau wadda take da sauƙin gujewa.

Tabon ajiya mai danshi yana faruwa ne lokacin da aka fallasa kayan da aka yi amfani da su a cikin danshi kamar ruwan sama, raɓa ko danshi (babban danshi), kuma suka kasance a wurin da iskar iska ke da ƙarancin iska a saman yankin. Waɗannan yanayi na iya shafar yadda ake samar da patina mai kariya.

Yawanci, zinc yana amsawa da farko da iskar oxygen don samar da zinc oxide, sannan da danshi don samar da zinc hydroxide. Da iska mai kyau, zinc hydroxide zai canza zuwa zinc carbonate don samar da kariya ga zinc, don haka rage saurin tsatsa. Duk da haka, idan zinc ba shi da damar shiga iska mai gudana kuma ya ci gaba da fuskantar danshi, zinc hydroxide zai ci gaba da girma kuma ya samar da tabo mai danshi.

Tsatsa fari na iya tasowa tsawon makonni ko ma da dare idan yanayin ya yi daidai. A cikin mawuyacin yanayi na bakin teku, tabon ajiya na iya faruwa daga tarin gishirin iska da ke shan danshi a cikin dare.

Wasu ƙarfe masu galvanized na iya haifar da wani nau'in tabon ajiya mai danshi wanda aka sani da 'baƙi mai tabo', wanda ke bayyana a matsayin tabo masu duhu tare da ko ba tare da tsatsa mai launin fari a kusa da shi ba. Wannan nau'in tabon ajiya mai danshi ya fi yawa akan ƙarfe mai ma'aunin haske kamar zanen gado, purlins da sassan rami masu sirara. Yana da wahala a tsaftace shi fiye da nau'ikan fari mai tsatsa na yau da kullun, kuma wani lokacin tabon yana iya bayyana bayan an goge shi.