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首页> 外文期刊>JCT research >Determining the Carbon Dioxide Permeability Of Paint Films
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Determining the Carbon Dioxide Permeability Of Paint Films

机译：测定漆膜的二氧化碳渗透性

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An in-house set-up was developed for determining the permeability of paint films towards carbon dioxide.The system implemented the so-called Wicke-Kallenback method,described in EN 1062-6.This method consists of a two-chamber permeation cell divided by a supported paint film.A carbon dioxideitrogen mixture stream (15% CO_2/85% N_2) is fed to the retentate chamber and a nitrogen carrier stream is fed to the permeate chamber.Carbon dioxide permeates from the retentate to the permeate chamber.The carbon dioxide flow rate is obtained from the permeate concentration and flow rate.From the carbon dioxide flow rate it is possible to calculate the paint film permeability towards this gas.The coating system is applied on a Kraft paper support sheet;the Kraft paper by itself shows negligible permeation resistance.Coatings to be considered as "surface protection systems for concrete" must comply with EN 1504-2.This standard requires that the paint film permeability have an equivalent air thickness of S_D >= 50 m.The unit developed was able to quickly determine permeabilities as low as an equivalent air thickness of S_D = 1500 m.
机译：为了确定漆膜对二氧化碳的渗透性，开发了一套内部装置，该系统采用了EN 1062-6中所述的所谓的Wicke-Kallenback方法，该方法由两室渗透池组成。将二氧化碳/氮气混合物流（15％CO_2 / 85％N_2）送入渗余物室，将氮气载流送入渗透物室。二氧化碳从渗余物渗透到渗透物室从渗透物浓度和流速获得二氧化碳流速。从二氧化碳流速可以计算出漆膜对这种气体的渗透率。涂层系统适用于牛皮纸支撑板;牛皮纸本身被认为是微不足道的耐渗透性。被视为“混凝土表面保护系统”的涂料必须符合EN 1504-2。该标准要求漆膜的渗透性应具有等效的空气稠度S_D> = 50 m。开发的装置能够快速确定低至等效空气厚度S_D = 1500 m的渗透率。

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