Study On Film Formation Characteristics And Anticorrosion And Energy Saving Mechanism Of Titanium In Molten Salt

The dissolution mechanism of Ti O₂ in Na Cl-Ca Cl₂ system was determined by theoretical calculation.The chemical reaction dissolves.The phase diagram of Na Cl-Ca Cl₂ binary system shows that the lowest melting point of the system when Na Cl:Ca Cl₂=0.48:0.52,and the experimental results of differential thermal analyzer show that the initial crystal temperature of the system does not change much when the content of Ti O₂is less than 10%.In addition,the melting point and the complete solidification temperature of the entire system did not change much.The reduction mechanism of Ti O₂ in Na Cl-Ca Cl₂ system was studied by thermodynamic calculation and cyclic voltammetry,chronoamperometry and square wave voltammetry.Combined with theoretical calculations and experimental studies,Ti（IV）was studied.The ions are metal titanium after three steps of reduction（Ti（IV）→Ti（III）→Ti（II）→Ti）,and the whole reaction is an irreversible process controlled by diffusion,and the nucleation mechanism is three-dimensional hemispherical instant nucleation.The film formation characteris tics of titanium on low carbon steel substrates were studied by molten salt electrodeposition.The conditions of single factor（duty cycle,deposition current,deposition time,deposition temperature and deposition method）were studied and found to be pulsed.When the deposition power source is powered,the deposition time is controlled to be 6 h,the deposition temperature is 800℃,and the deposition current is 1.0 A,the deposited deposition layer is uniform and dense.Finally,the prepared titanium-containing coating material was tested for corrosion resistance in a simulated seawater environment.The reaction medium for simulating seawater was a3.5%Na Cl aqueous solution,and the conventional electrochemical corrosion technique was used to conduct corrosion resistance by polarization curve method and AC impedance method.The performance test shows that the increase of the titanium content of the coating has a significant effect on the corrosion resistance of the material.Figure 45;Table 16;Reference 60...