Nyere nhema pombi yakagadzirwa nesimbi isati yaiswa marati.Zita rayo rinobva kune scaly, rima-ruvara iron oxide coating pamusoro payo.Inoshandiswa muzvishandiso zvisingade simbi yakabatiswa.

Nyeredzi nhema pombi (Isina kuvharwa simbi pombi) inonzi "dema" nekuda kweiyo yakasviba-ruvara iron-oxide sikero yakaumbwa pamusoro payo;inowanzoshandiswa kune yakaderera-inopisa-inopisa-mvura inopisa pombi.Inowanikwa muzvirongwa zviviri (chirongwa 40 uye kuronga makumi masere).Musiyano pakati pezvirongwa zviviri ndiwo upamhi hwemadziro epombi.Purogiramu 80 yepipe yesimbi yakasviba yakakura kudarika purogiramu 40. Munzvimbo dzakawanda hurongwa hwe80 hunodiwa pamutsara we condensate nekuda kweasidhi uye tsvina.Ini ndinoikurudzira zvakanyanya pamusoro pechirongwa 40.

Kana pombi yesimbi inogadzirwa, dema oxide sikero inoumbwa pamusoro payo kuti ipe kupera kunoonekwa pamhando iyi yepombi.Nekuti simbi inokwanisa kuita ngura uye kuita ngura, fekitori inoipfekedzawo nemafuta anodzivirira.Idzo simbi nhema dzinoshandiswa pakugadzira pombi uye chubhu, iyo isingazoiti ngura kwenguva yakareba uye inoda kudiki kwazvo kugadzirisa.Inotengeswa mune yakajairwa 21-tsoka kureba TBE.Inoshandiswa zvakanyanya kune zvakajairwa kushandiswa mumvura, gasi, mhepo uye chiutsi, pombi dzesimbi nhema uye chubhu zvinoshandiswa kugovera gasi mukati nekunze kwemba uye nekutenderera kwemvura inopisa muma boiler masisitimu.Inoshandiswawo kumapombi emutsetse mumaindasitiri emafuta nepetroleum, kumatsime emvura uye kumvura, gasi netsvina.