Ferra shi ne mai tsayi kuma mutane suka yi amfani da shi a dukkan bayanai, kamar abokaci, kofin kasa ko otutu. Amma ferra zai iya kawo rust idan ya samu ruwa ko wasu chemicals. Wannan rust yana kawo ferra da karami kuma yana iya gudan kafin yin amfani. Don ajiye ferra, mutane masu amfani suka sanya wasu paints mai tsayi da suka yi amfani da su a cikin ferra, wanda aka kira anti-corrosion coating. Qianlang ta yi abubuwan da suka yi amfani da su mai kyau abin da ke kafa a cikin tsarin epoxy don fasaha na satali wanda suka taimaka ferra don fara daga rust. Wadannan coatings suna mahimmanci don haka abubuwan ferra zasu iya ci gaba da karami kuma zasu iya zama mai tsayi.
Yana da kyau manya idan za a amfani da coatings na anti-corrosion a cikin steel. Bayanin farko, suka kare steel daga rust da corrosion, wanda zai faru idan ruwa ko shinkafa ko chemicals suka gaba da metal. Idan steel ya faru a rust, yana zama mai tsoro kuma ba za a iya amfani da shi da safe ba. Daga coating na Qianlang, steel yana zama mai tsoro kuma yana iya ci gaba da manya. Bayanin biyu, yana taimaka wajen rage kudada. Idan ba a samu rust, ba za a bukata steel don sauran lokaci, kuma wannan yana rage kudada na repairs ko parts na uku. Wannan yana da muhimmanci ga abubuwan kamar bridges da buildings inda bukatar steel yana da kudada sosai.