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| Anti-corrosion Technology in Effusion Package of Separators in the Gas Gathering Station |
| Received:March 20, 2019 Revised:April 22, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2019.08.010 |
| KeyWord:effusion package internal corrosion anti-corrosion coating BEASY simulation sacrificial anode |
| Author | Institution |
| CHENG Jie |
Xi′an Changqing Technology Engineering Co., Ltd., Xi′an , China |
| SUN Fang-ping |
Xi′an Changqing Technology Engineering Co., Ltd., Xi′an , China |
| CUI Xi |
Xi′an Changqing Technology Engineering Co., Ltd., Xi′an , China |
| LI Zi-li |
Shandong Key Laboratory of Oil & Gas Storage and Transportation Safety, China University of Petroleum East China, Qingdao , China |
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| Abstract: |
| Objective To improve the anti-corrosion performance of the effusion package under the separator. Methods Firstly, in order to investigate whether the coating composed of THF8110-I wet-heat-resistant heavy-duty anti-corrosive topcoat and primer for rusted steel meets the requirements of the site, the appearance, abrasion resistance, hardness, adhesion, salt spray resistance and corrosion resistance of the coating were tested by experiments. Then the quality and quantity of anode materials were designed and calculated according to relevant standards. On this basis, BEASY software simulation was used to obtain the potential distribution of the inner wall of the effusion package under different layout of different anode materials, so the effect of cathodic protection was analyzed to choose better anode material. The effect of the layout of the anode on cathodic protection was analyzed. Finally, the potential distribution of the inner wall of the effusion package under two different fixation modes of welding and bolt connection was obtained by simulation to choose appropriate fixation modes. And for bolt connection, the distance between the anode and the effusion package was changed to choose suitable distance. Results The performance of the coating composed of THF8110-I wet-heat-resistant heavy-duty anti-corrosive topcoat and primer for rusted steel met the technical requirements on all aspects. Under the same layout, the protective potential of aluminum anode to the effusion package was always more negative than that of zinc anode. When the anode material was the same, the difference of potential range of the inner wall of effusion package under the five layout modes was less than 1 mV. Meanwhile, compared with welding, when the anode was fixed by bolt connection and the distance between the anode and the effusion package was 150 mm, the potential distribution of the inner wall was the most uniform. Conclusion The anti-corrosion ability of the inner wall of the liquid package can be improved by the anti-corrosion coating combined with the sacrificial anode protection. Among them, the coating is composed of THF8110-I wet-heat-resistant heavy-duty anti-corrosive topcoat and primer for rusted steel. And for the sacrificial anode protection scheme, the cathodic protection effect was the best when four aluminum anodes were evenly distributed at the bottom of the effusion package, and the bolt connection is selected as the fixation mode of the anode with the distance between the anode and the bottom end of the effusion package designed to be 150 mm. |
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