About Chromates

Chromate Ion

Chromate salts contain the anion CrO42-, while dichromate salts contain the dichromate anion, Cr2O72-. Both classes of compounds contain chromium in the oxidation state +6--hexavalent chromium--and act as strong oxidizing agents. Water soluble chromates are frequently used in chrome electroplating processes used to protect underlying metals from corrosion or improve paint adhesion. Chromate conversion coating, a process which uses oxidants to passivate certain metal alloy surfaces, may utilize chromate derived from chromic acid. Non-soluble chromates have strong colors and have been used as pigments. Because hexavalent chromium is now known to be toxic, chromate waste disposal is regulated and chromate usage is declining in areas where there are suitable substitutes. In particular, chromium pigments such as chrome yellow, widely recognized as the color of American school buses, have largely fallen out of use in favor of safer pigment compounds.

Recent Research & Development for Chromates

Carbon-dependent chromate toxicity mechanism in an environmental Arthrobacter isolate., Field, Erin K., Blaskovich John P., Peyton Brent M., and Gerlach Robin , J Hazard Mater, 2018 May 12, Volume 355, p.162-169, (2018)

A luminescent zinc(ii) coordination polymer with unusual (3,4,4)-coordinated self-catenated 3D network for selective detection of nitroaromatics and ferric and chromate ions: a versatile luminescent sensor., Zhang, Ya-qian, Blatov Vladislav A., Zheng Tian-Rui, Yang Chang-Hao, Qian Lin-Lu, Li Ke, Li Bao-Long, and Wu Bing , Dalton Trans, 2018 May 01, Volume 47, Issue 17, p.6189-6198, (2018)

Density functional theory modeling of chromate adsorption onto ferrihydrite nanoparticles., Kubicki, James D., Kabengi Nadine, Chrysochoou Maria, and Bompoti Nefeli , Geochem Trans, 2018 Mar 01, Volume 19, Issue 1, p.8, (2018)

Crystal structure of silver [(propane-1,3-diyl-dinitrilo-κ2N,N')-tetra-acetato-κ4O,O',O'',O''']chromate(III) from synchrotron X-ray data., Moon, Dohyun, Ryoo Keon Sang, and Choi Jong-Ha , Acta Crystallogr E Crystallogr Commun, 2018 Mar 01, Volume 74, Issue Pt 3, p.278-281, (2018)

The effect of electron competition on chromate reduction using methane as electron donor., Lv, Pan-Long, Zhong Liang, Dong Qiu-Yi, Yang Shi-Lei, Shen Wei-Wei, Zhu Quan-Song, Lai Chun-Yu, Luo An-Cheng, Tang Youneng, and Zhao He-Ping , Environ Sci Pollut Res Int, 2018 Mar, Volume 25, Issue 7, p.6609-6618, (2018)

Dynamic interactions between sulfidated zerovalent iron and dissolved oxygen: Mechanistic insights for enhanced chromate removal., Shao, Qianqian, Xu Chunhua, Wang Yahao, Huang Shasha, Zhang Bingliang, Huang Lihui, Fan Dimin, and Tratnyek Paul G. , Water Res, 2018 05 15, Volume 135, p.322-330, (2018)

Applying a modified Donnan model to describe the surface complexation of chromate to iron oxyhydroxide agglomerates with heteromorphous pores., Wei, Zongsu, and Semiat Raphael , J Colloid Interface Sci, 2017 Nov 15, Volume 506, p.66-75, (2017)

Characterisation of the rare cadmium chromate pigment in a 19th century tube colour by Raman, FTIR, X-ray and EPR., Christiansen, Marie Bitsch, Sørensen Mikkel Agerbæk, Sanyova Jana, Bendix Jesper, and Simonsen Kim Pilkjær , Spectrochim Acta A Mol Biomol Spectrosc, 2017 Mar 15, Volume 175, p.208-214, (2017)

Mechanochemical and Conventional Synthesis of Zn(II)/Cd(II) Luminescent Coordination Polymers: Dual Sensing Probe for Selective Detection of Chromate Anions and TNP in Aqueous Phase., Parmar, Bhavesh, Rachuri Yadagiri, Bisht Kamal Kumar, Laiya Ridhdhi, and Suresh Eringathodi , Inorg Chem, 2017 Mar 06, Volume 56, Issue 5, p.2627-2638, (2017)

Ba19Cr12O45: A High Pressure Chromate with an Original Structure Solved by Electron Diffraction Tomography and Powder X-ray Diffraction., Lepoittevin, Christophe, Jeanneau Justin, Toulemonde Pierre, Sulpice André, and Núñez-Regueiro Manuel , Inorg Chem, 2017 Jun 05, Volume 56, Issue 11, p.6404-6409, (2017)

Structure, solution assembly, and electroconductivity of nanosized argento-organic-cluster/framework templated by chromate., Li, Xiao-Yu, Su Hai-Feng, Kurmoo Mohamedally, Tung Chen-Ho, Sun Di, and Zheng Lan-Sun , Nanoscale, 2017 Apr 20, Volume 9, Issue 16, p.5305-5314, (2017)

Kinetics and mechanism of desilication reaction in sodium chromate solution using sodium aluminate., Chen, Jianxin, Zhang Xiangchao, Han Jian, Li Yinhui, Su Min, and Lu Aidang , Water Sci Technol, 2017 Apr, Volume 75, Issue 7-8, p.1548-1554, (2017)