Ruvara epurasitiki akapfapfaidza Coated malleable simbi pombi Fittings rudzi rwesimbi inoumbika pombi fittings.Iyo inoumbwa neyakagadzika iron layer uye ruvara rwakapfapfaidza layer.Rudzi rwakapfapfaidza runyoro ruri pamusoro, uye ukobvu hwemavara akapfapfaidzwa dhiri ndeye ≥100/μm.Iyo ine mabhenefiti eiyo inonzwisisika chimiro, asidhi uye alkali kuramba, isina tsvina, isina kuvuza, hupenyu hurefu hwebasa, kutaridzika kwakanaka, uye inogona kushandiswa kune zvakasiyana zvinangwa.