Corrosion Protection of Carbon Steel in Circulating Cooling Water by Open‐chain Carboxyethyltin and Transition Metal Co‐functionalized Tungstogermanates. Issue 25 (4th July 2018)

• Record Type: Journal Article
• Authors: Sang, Xiaojing; Wang, Zhixin; Li, Jiansheng; Wang, Haidan; Su, Fang; Liu, Zhaobin; Zhang, Lancui; Zhu, Zaiming
• Is Part Of: ChemistrySelect. Volume 3:Issue 25(2018)
• Page Start: 7358
• Page End: 7362
• Publication Date: 2018-07-04
• Subjects: Carboxyethyltin -- Corrosion -- Organic-Inorganic hybrid composites -- Polyoxometalates; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201800789
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Open‐chain carboxyethyltin and transition metal (TM) co‐decorated double armed type polyoxometalates (POMs) [C(NH2 )3 ]10 H2 [(TM)2 (SnCH2 CH2 COO)2 (B‐α‐GeW9 O34 )2 ]nH2 O (abbreviated asGeW9 ‐TM‐SnR‐COO, TM=Mn, Cu, Zn) were firstly applied as corrosion inhibitors for carbon steel in circulating cooling water, and the corrosion inhibition abilities of them and their parent POMs Na12 [(TM)4 (H2 O)2 (GeW9 O34 )2 ]nH2 O (abbreviated asGeW9 ‐TM, TM=Mn, Cu, Zn) were evaluated by gravimetric method and electrochemical impedance spectroscopy. The morphology, composition and element oxidation state of metallic surface film were characterized by scanning electron microscopy/energy dispersive X‐ray spectroscopy (SEM/EDX) and X‐ray photoelectron spectroscopy (XPS) technologies. Compared withGeW9 ‐TM, GeW9 ‐TM‐SnR‐COO organic‐inorganic hybrids improved corrosion resistance of carbon steel. Additionally, GeW9 ‐TM‐SnR‐COO showed good synergistic effect with polyhydric alcohol phosphate ester (PAPE) and sulfonate copolymer (AMPS), and the maximum inhibition efficiency is up to 97% forGeW9 ‐Zn‐SnR‐COO +PAPE+AMPS composite. Abstract : Open‐chain carboxyethyltin and TM co‐decorated double armed type POMs (GeW9 ‐TM‐SnR‐COO, TM=Mn, Cu, Zn) were firstly applied as corrosion inhibitors for carbon steel in circulating cooling water, which can effectively inhibit the pitting corrosion forming on carbon steel, improve corrosion inhibition efficiencies and corrosion resistances at the interface of carbon steel and electrolyte solution.