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        離心機防腐失效帶來的后果是災難性的,會導致強度喪失而產生爆裂、泄漏污染甚至人身傷害,因此在選型時應提供/獲得詳細的介質理化數據,選擇恰當的材料。

        在選型時應按所分離的腐蝕介質以及濃度、溫度和其它因素(如雜質、PH值、是否含有空氣,流動或靜止)等理化數據,選擇合適的材質或表面涂層,滿足防腐要求。

        不能忽略密封元件的防腐要求,密封件材質應確保防止酸堿、溶劑的腐蝕。

        對于混酸或酸、鹽、溶劑的混合物,可以參考已經驗證的的應用實踐選擇滿足防腐要求的材料。在沒有對應的腐蝕數據時,應進行掛片試驗、實驗室驗證,以確保材料選擇滿足防腐要求。

        掛片試驗時,金屬或涂層材料浸入母液中,母液的溫度、濃度、PH值等應與實際工況一致,以保證試驗環境的模擬可比性。但掛片試驗不能體現離心機實際工況中的應力腐蝕和沖刷腐蝕,在選材時應引起注意。

        試驗掛片除了進行外觀檢查還需要進行化學成分和機械性能檢驗,幫助我們確定材料選擇是否合適。

滿足防腐要求(和滿足防爆要求),是離心機選型的首要條件!

 

Application of Anti-corrosion Technology in Centrifuge

Consequence of anticorrosion failure to the centrifuge is catastrophic. It can cause loss of strength, resulting in burstleakagepollutionand even personal injury.Therefore the user should provide whose obtained physical&chemical data of the medium. So that the supplier can well choose&confirm the appropriate materials.

The suitable material or surface coating should be selected according to the physical&chemical data of the separated corrosion mediumconcentration, temperature and other factors(sueh as impurityPH valueair, flow or static)etc. so that meet the anticorrosion requirements.

Never ignore the corrosion protection requirements of sealing components. The seal material should ensure to prevent acid, alkali, solvent corrosion.

For mixed acids or mixtures of acids, salts, and solventsit is possible to select materials that meet the requirements of anticorrosion with reference to proven application practices. In the absence of corresponding corrosion datarelevant corrosion coupon test and Iab validation shall be conducted to ensure that the material selection meets the requirements of corrosion protection.

When conducting the corrosion coupon testthe metal or coating material is immersed in the mother liquor of corrosion mediumthe temperatureconcentration and PH value of the mother liquor should be consistent with the actual working conditions. in order to ensure the simulation comparability of the test environment. But the coupon test can not reflect the stress corrosion and scour corrosion in the actual working condition of centrifuge. it should be paid attention when selecting materials.

The coupon test still need chemical composition&mechanical properties tests except external inspection. So that help supplier determine whether the material selection is appropriate.

To meet the anti-corrosion requirements(and ex-proof) is the first condition of centrifuge selection!

 

離心機常用金屬材料:

奧氏體不銹鋼:304321316L

雙相不銹鋼:22052507

鈦材:TA1TA2

表面防腐襯涂:HALARF40F46PFAPE;襯橡膠

 

Metal material normally used in centrifuge:

Austenitic stainless steel: 304321316L

Duplex stainless steel: 22052507

Titanium material: TA1TA2

Surface anticorrosive coating: HALARF40F46PFA; PE, Rubber Iiner

 

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