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Hexagonal Boron Nitride for Sulfur Corrosion Inhibition
ACS Nano ( IF 17.1 ) Pub Date : 2020-10-26 , DOI: 10.1021/acsnano.0c03625
Govind Chilkoor 1 , Kalimuthu Jawaharraj 2 , Bhuvan Vemuri 2 , Alex Kutana 3 , Manoj Tripathi 4 , Divya Kota 5 , Taib Arif 6 , Tobin Filleter 6 , Alan B. Dalton 4 , Boris I. Yakobson 3 , M. Meyyappan 7 , Muhammad M. Rahman 3 , Pulickel M. Ajayan 3 , Venkataramana Gadhamshetty 1
Affiliation  

Corrosion by sulfur compounds is a long-standing challenge in many engineering applications. Specifically, designing a coating that protects metals from both abiotic and biotic forms of sulfur corrosion remains an elusive goal. Here we report that atomically thin layers (∼4) of hexagonal boron nitride (hBN) act as a protective coating to inhibit corrosion of the underlying copper (Cu) surfaces (∼6–7-fold lower corrosion than bare Cu) in abiotic (sulfuric acid and sodium sulfide) and biotic (sulfate-reducing bacteria medium) environments. The corrosion resistance of hBN is attributed to its outstanding barrier properties to the corrosive species in diverse environments of sulfur compounds. Increasing the number of atomic layers did not necessarily improve the corrosion protection mechanisms. Instead, multilayers of hBN were found to upregulate the adhesion genes in Desulfovibrio alaskensis G20 cells, promote cell adhesion and biofilm growth, and lower the protection against biogenic sulfide attack when compared to the few layers of hBN. Our findings confirm hBN as the thinnest coating to resist diverse forms of sulfur corrosion.

中文翻译:

六方氮化硼对硫的腐蚀抑制作用

硫化合物的腐蚀是许多工程应用中的长期挑战。具体地说,设计一种保护金属免受非生物和生物形式的硫腐蚀的涂层仍然是一个遥不可及的目标。在这里,我们报道六方氮化硼(hBN)的原子薄层(〜4)起到了保护涂层的作用,从而抑制了非生物(硫酸和硫化钠)以及生物(减少硫酸盐的细菌培养基)环境。hBN的耐腐蚀性归因于其在各种硫化合物环境中对腐蚀性物质的出色阻隔性能。增加原子层的数量并不一定改善腐蚀防护机理。代替,与hBN的几层相比,阿拉斯加脱硫弧菌G20细胞可促进细胞粘附和生物膜生长,并降低对生物硫化物攻击的保护作用。我们的发现证实hBN是最薄的涂层,可以抵抗各种形式的硫腐蚀。
更新日期:2020-11-25
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