Influence of an emulsion coating on the corrosion resistance of hull plates made of mild steel in natural sea water

Zastita materijala Pub Date : 2023-01-01 DOI:10.5937/zasmat2303340s

Thangaiyan Santhi, Arjunan Krishnaveni, David Gnanasangeetha, Janani Kuppusamy, Sevvanthi Kuttipaiyan, Kaniya Duraisamy, Thulasi Elumalai, Sarmina Duraisamy, Dorothy Rajendran, Thanappan Sasilatha, Susai Rajendran

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Abstract

The corrosion resistance of mild steel, used to make hull plates in ship technology, in sea water before paint coating [Nippon paint SUMO XTRA durable exterior emulsion coating (emulsion coating)] and after paint coating has been measured by electrochemical studies such as polarisation study and AC impedance spectra. It is observed that after paint coating, the corrosion resistance of mild steel hull plates increases. Polarization study reveals that after paint coating, the linear polarization resistance increases and corrosion current decrease. AC impedance spectra reveal that in the presence of paint coating charge transfer resistance value increases, impedance value increases, phase angle increases and double layer capacitance value decreases. The corrosion inhibition efficiency was greater than 99%. The hull plates made of mild steel may be coated with durable exterior emulsion coating (emulsion coating). This will control the corrosion of the hull plates in the sea water. There will be increase in the life time of the hull plates.

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乳化液涂层对低碳钢船体板耐天然海水腐蚀性能的影响

通过极化研究和交流阻抗谱等电化学研究，测量了船舶技术中用于制造船体板的低碳钢在涂漆前(Nippon漆SUMO XTRA耐用外部乳化漆(乳化漆))和涂漆后在海水中的耐蚀性。观察到，涂漆后，软钢船体板的耐腐蚀性提高。极化研究表明，涂料涂层后，线极化电阻增大，腐蚀电流减小。交流阻抗谱显示，有涂料存在时，涂层电荷转移电阻值增大，阻抗值增大，相角增大，双层电容值减小。缓蚀率大于99%。由低碳钢制成的船体板可涂上耐久的外部乳化漆(乳化漆)。这将控制船体板在海水中的腐蚀。船体板的寿命将会增加。

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Zastita materijala Materials Science-General Materials Science

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0.80

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