Phosphating inzira yakakosha yekudzivirira ngura mumidziyo yesimbi.Zvinangwa zvaro zvinosanganisira kupa dziviriro yecorrosion kune base simbi, kushanda senge yekutanga isati yapenda, kusimudzira adhesion uye corrosion kuramba kwemateya ekuputira, uye kuita semafuta ekuzora simbi.Phosphating inogona kuiswa mumhando nhatu zvichienderana nemashandisirwo ayo: 1) coating phosphating, 2) inotonhora extrusion lubrication phosphating, uye 3) yekushongedza phosphating.Inogonawo kuiswa mumhando yefosfate inoshandiswa, yakadai sezinc phosphate, zinc-calcium phosphate, iron phosphate, zinc-manganese phosphate, uye manganese phosphate.Pamusoro pezvo, phosphating inogona kuiswa muchikamu netembiricha: yakakwirira-tembiricha (pamusoro 80 ℃) phosphating, yepakati-tembiricha (50-70 ℃) phosphating, yakaderera-tembiricha (yakatenderedza 40 ℃) phosphating, uye kamuri-tembiricha (10-30 ℃) phosphating.
Kune rumwe rutivi, passivation inoitika sei musimbi, uye ndeipi nzira yayo?Zvakakosha kuziva kuti passivation chiitiko chinokonzerwa nekudyidzana pakati pechikamu chesimbi uye chikamu chekugadzirisa kana ne interfacial phenomena.Tsvagiridzo yakaratidza kukanganisa kwema mechanical abrasion pasimbi mune passivated state.Ongororo dzinoratidza kuti kuenderera mberi kubvongodzwa kwesimbi kunokonzeresa kusarudzika kwakashata musimba resimbi, kumisa simbi mune passivated state.Izvi zvinotaridza kuti passivation chinhu chakabatana chinoitika kana simbi dzakasangana nepakati pane mamwe mamiriro.Electrochemical passivation inoitika panguva yeanodic polarization, inotungamira kune shanduko mune inogoneka yesimbi uye kuumbwa kwesimbi oxides kana munyu pane electrode pamusoro, kugadzira passive firimu uye kukonzera simbi passivation.Kemikari passivation, kune rumwe rutivi, inosanganisira kuita kwakananga kweiyo oxidizing maajenti akadai seyakaomeswa HNO3 pasimbi, ichigadzira oxide firimu pamusoro, kana kuwedzerwa kwesimbi dzinogoneka nyore seCr uye Ni.Mumakemikari passivation, kusanganiswa kweiyo yakawedzerwa oxidizing agent haifaniri kuwira pasi pehuwandu hunokosha;kana zvisina kudaro, inogona kusakonzera passivation uye inogona kutungamirira kukurumidza kupera kwesimbi.
Nguva yekutumira: Jan-25-2024