Nakuba ibala lokugcina elimanzi noma 'ukugqwala okumhlophe' kungavamile ukulimaza ikhono lokuvikela le-galvanized coating, i-aesthetic blight okulula ukukugwema.

Ibala lokugcina elimanzi lenzeka lapho izinto ezisanda kufakwa uthayela zichayeka kumswakama njengemvula, amazolo noma ukujiya (umswakama ophezulu), futhi zihlala endaweni enokungena komoya okulinganiselwe phezu kwendawo.Lezi zimo zingathinta indlela i-patina evikelayo eyakhiwe ngayo.

Ngokuvamile, i-zinc isabela kuqala nge-oxygen ukuze yakhe i-zinc oxide, bese kuba nomswakama ukuze yakhe i-zinc hydroxide.Ngokugeleza komoya okuhle, i-zinc hydroxide ibe isiguqulela ku-zinc carbonate ukuze inikeze isivikelo sesithiyo ku-zinc, ngaleyo ndlela yehlise izinga lokugqwala kwayo.Kodwa-ke, uma i-zinc ingakwazi ukufinyelela emoyeni ogeleza mahhala futhi ihlala ichayeke kumswakama, i-zinc hydroxide iyaqhubeka nokukhula esikhundleni salokho futhi yenza ibala lokugcina elimanzi.

Ukugqwala okumhlophe kungakhula phakathi namasonto noma ngisho nobusuku obubodwa uma izimo zilungile.Ezindaweni eziqinile zasogwini, ibala lokugcina elimanzi lingase libe khona ezindaweni zikasawoti ezakhelwe emoyeni ezimunca umswakama ebusuku.

Enye insimbi ethathiwe ingathuthukisa uhlobo lwendawo yokugcina emanzi eyaziwa ngokuthi 'amabala amnyama', abonakala njengamachashaza amnyama anempuphu emhlophe noma engenawo ukugqwala okuzungezile.Lolu hlobo lwamabala okugcina amanzi luvame kakhulu kunsimbi yegeji ekhanyayo njengamashidi, ama-purlins kanye nezingxenye ezingenalutho ezinezindonga ezincane.Kunzima kakhulu ukuhlanza kunezinhlobo ezijwayelekile zokugqwala okumhlophe, futhi ngezinye izikhathi amabala angase abonakale ngemva kokuhlanza.