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您现在的位置:网站首页 - 应用技术离心机防腐技术

        离心机防腐失效带来的后果是灾难性的,会导致强度丧失而产生爆裂、泄漏污染甚至人身伤害,因此在选型时应提供/获得详细的介质理化数据,选择恰当的材料。

        在选型时应按所分离的腐蚀介质以及浓度、温度和其它因素(如杂质、PH值、是否含有空气,流动或静止)等理化数据,选择合适的材质或表面涂层,满足防腐要求。

        不能忽略密封元件的防腐要求,密封件材质应确保防止酸碱、溶剂的腐蚀。

        对于混酸或酸、盐、溶剂的混合物,可以参考已经验证的的应用实践选择满足防腐要求的材料。在没有对应的腐蚀数据时,应进行挂片试验、实验室验证,以确保材料选择满足防腐要求。

        挂片试验时,金属或涂层材料浸入母液中,母液的温度、浓度、PH值等应与实际工况一致,以保证试验环境的模拟可比性。但挂片试验不能体现离心机实际工况中的应力腐蚀和冲刷腐蚀,在选材时应引起注意。

        试验挂片除了进行外观检查还需要进行化学成分和机械性能检验,帮助我们确定材料选择是否合适。

满足防腐要求(和满足防爆要求),是离心机选型的首要条件!

 

Application of Anti-corrosion Technology in Centrifuge

Consequence of anticorrosion failure to the centrifuge is catastrophic. It can cause loss of strength, resulting in burst,leakage,pollution,and 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 medium,concentration, temperature and other factors(sueh as impurity,PH value,air, 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 solvents,it is possible to select materials that meet the requirements of anticorrosion with reference to proven application practices. In the absence of corresponding corrosion data,relevant 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 test,the metal or coating material is immersed in the mother liquor of corrosion medium,the temperature,concentration 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!

 

离心机常用金属材料:

奥氏体不锈钢:304、321、316L

双相不锈钢:2205、2507

钛材:TA1、TA2

表面防腐衬涂:HALAR、F40、F46、PFA;PE;衬橡胶

 

Metal material normally used in centrifuge:

Austenitic stainless steel: 304、321、316L

Duplex stainless steel: 2205、2507

Titanium material: TA1、TA2

Surface anticorrosive coating: HALAR、F40、F46、PFA; PE, Rubber Iiner

 

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