To solve the problem of chromium pollution in electrolytic manganese industry, a novel Ti conversion coating for electrolytic manganese was found to improve its anti-corrosion property. The excellent Ti conversion coating was formed on manganese surface under the optimized conditions of Ti4+ concentration: 0.01 mol L−1, H2SO4 concentration: 4.60 g L−1, H2O2 concentration: 60 ml L−1 and immersion time: 20 s. The results of the electrochemical test exhibited that the Ti conversion coating can work well in inhibiting the Mn from corrosion, and the corrosion current density was obviously dropped from 3.52×10−4 to 7.97×10−7 A·cm−2. The results of XPS showed that the main composition of the conversion coating was MnO2, Mn2O3 and TiO2, and the formation mechanism of the Ti conversion coating was revealed.
XueJrZhongHWangS. Influence of oxalate anions on manganese electrodeposition in sulfate solution. Ionics. 2016; 22: 683–693. doi: 10.1007/s11581-015-1584-y
2.
DuanNDanZGWangF. Electrolytic manganese metal industry experience based China's new model for cleaner production promotion. J Clean Prod. 2011; 19: 2082–2087. doi: 10.1016/j.jclepro.2011.06.024
3.
XuWJSongJLSunJ. Rapid fabrication of large-area, corrosion-resistant superhydrophobic Mg alloy surfaces. ACS Appl Mater Interfaces. 2011; 3: 4404–4414. doi: 10.1021/am2010527
4.
WangZLiQSheZ. Low-cost and large-scale fabrication method for an environmentally-friendly superhydrophobic coating on magnesium alloy. J Mater Chem. 2012; 22: 4097–4105. doi: 10.1039/c2jm14475a
5.
TianZHShiHWLiuFC. Inhibiting effect of 8-hydroxyquinoline on the corrosion of silane-based sol-gel coatings on AA 2024-T3. Prog Org Coat. 2015; 82: 81–90. doi: 10.1016/j.porgcoat.2015.01.018
6.
BeraSRoutTKUdayabhanuG. Comparative study of corrosion protection of sol-gel coatings with different organic functionality on Al-2024 substrate. Prog Org Coat. 2015; 88: 293–303. doi: 10.1016/j.porgcoat.2015.07.006
7.
YoganandanGBalarajuJNLowCHC. Electrochemical and long term corrosion behavior of Mn and Mo oxyanions sealed anodic oxide surface developed on aerospace aluminium alloy (AA2024). Surf Coat Technol. 2016; 288: 115–125. doi: 10.1016/j.surfcoat.2016.01.005
8.
DeNAPaussaLGobessiA. Cerium conversion coating and sol–gel multilayer system for corrosion protection of AA6060. Surf Coat Technol. 2016; 287: 33–43. doi: 10.1016/j.surfcoat.2015.12.059
9.
NingDWangFZhouCB. Analysis of pollution materials generated from electrolytic manganese industries in China. Resour Conserv Recycl. 2010; 54: 506–511. doi: 10.1016/j.resconrec.2009.10.007
10.
KrishnaNGThinaharanCGeorgeRP. Surface modification of type 304 stainless steel with duplex coatings for corrosion resistance in sea water environments. Surf Eng. 2015; 31: 39–47. doi: 10.1179/1743294414Y.0000000354
11.
SaarimaaVMarkkulaAJuhanojaJ.Determination of surface topography and composition of Cr-free pretreatment layers on hot dip galvanized steel. J Coat Sci Technol. 2014; 1: 88–95.
12.
ChangSHNiuLYSuYC. Effect of the pretreatment of silicone penetrant on the performance of the chromium-free chemfilm coated on AZ91D magnesium alloys. Mater Chem Phys. 2016; 171: 312–317. doi: 10.1016/j.matchemphys.2016.01.022
13.
JianSYChuYRLinCS.Permanganate conversion coating on AZ31 magnesium alloys with enhanced corrosion resistance. Corros Sci. 2015; 93: 301–309. doi: 10.1016/j.corsci.2015.01.040
14.
LiuYLiSZhangJJ. Corrosion inhibition of biomimetic super-hydrophobic electrodeposition coatings on copper substrate. Corros Sci. 2015; 94: 190–196. doi: 10.1016/j.corsci.2015.02.009
15.
ZhangSDZhangWLWangSG. Characterisation of three-dimensional porosity in an Fe-based amorphous coating and its correlation with corrosion behaviour. Corros Sci. 2015; 93: 211–221. doi: 10.1016/j.corsci.2015.01.022
16.
CaoZFQiuPChenP. Super-hydrophobic coating used in corrosion protection of metal material: review, discussion and prospects. Metall Res Technol. 2017; 114: 203. doi: 10.1051/metal/2016063
17.
CaoZFWangJQiuP. Hydrophobic coatings for improving corrosion resistance of manganese substrate. Surf Coat Technol. 2018; 347: 235–244. doi: 10.1016/j.surfcoat.2018.04.075
18.
SinghAKRoutTKNarayanR. Anti-corrosive hybrid sol-gel film on metallic substrates and method of producing the same. U.S. Patent 8900670[P]. 2014-12-2.
19.
YoganandanGPremkumarKPBalarajuJN.Evaluation of corrosion resistance and self-healing behavior of zirconium–cerium conversion coating developed on AA2024 alloy. Surf Coat Technol. 2015; 270: 249–258. doi: 10.1016/j.surfcoat.2015.02.049
20.
WeiXZhangYJiangZ.A simple and sensitive SPRS method for trace H2O2 based on the TiO2+ complex and gold nanoparticles aggregation reactions. Plasmonics. 2009; 4: 181–185. doi: 10.1007/s11468-009-9089-z
21.
XuFJiangLDanZ. Water balance analysis and wastewater recycling investigation in electrolytic manganese industry of China - A case study. Hydrometallurgy. 2014; 149: 12–22. doi: 10.1016/j.hydromet.2014.05.002
22.
ASTM G59-97. Standard test method for conducting potentiodynamic polarization resistance measurements. West Conshohocken (PA): ASTM International; 2014; www.astm.org.
23.
ASTM G102-89. Standard practice for calculation of corrosion rates and related information from electrochemical measurements. West Conshohocken (PA): ASTM International; 2015; www.astm.org.
GiriAGoswamiNPalM. Rational surface modification of Mn3O4 nanoparticles to induce multiple photoluminescence and room temperature ferromagnetism. J Mater Chem C. 2013; 1: 1885–1895. doi: 10.1039/c3tc00709j
27.
RamírezAHillebrandPStellmachD. Evaluation of MnOx, Mn2O3, and Mn3O4 electrodeposited films for the oxygen evolution reaction of water. The J Phys Chem C. 2014; 118: 14073–14081. doi: 10.1021/jp500939d
28.
LuFCaoZFYangF. Fabrication of hydrophobic coating on electrolytic manganese surface for enhancing. Prog Org Coat. 2019; 132: 379–387. doi: 10.1016/j.porgcoat.2019.04.026
29.
CaoZFLuFQiuP. Formation of a hydrophobic and corrosion resistant coating on manganese surface via stearic acid and oleic acid diethanolamide. Colloids Surf A. 2018; 555: 372–380. doi: 10.1016/j.colsurfa.2018.07.020
30.
ZhouMPangXWeiL.Insitu grown superhydrophobic Zn–Al layered double hydroxides films on magnesium alloy to improve corrosion properties. Appl Surf Sci. 2015; 337: 172–177. doi: 10.1016/j.apsusc.2015.02.086
