Experimental investigation on corrosion behavior of slag-cement-mortar-lined ductile iron pipe in flowing solutions

Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines

“…It also proved that the complete cement mortar lining had a good protection effect by maintaining the passive state of the ductile iron surface the entire time. 17 According to the experimental results of electrode ② (ductile iron with 90% lining) as shown in Fig. 5b, the Nyquist plot was composed of a capacitive reactance arc in the high-and lowfrequency regions individually during 1-10 d. Aer it rose for 10 days, R f was about 4700 U cm 2 (ESI Table S4 †).…”

“…CASH had also been detected in the corrosion research of the slag cement mortar, and was a hydrate gel of the cement mortar. 17 Furthermore, the SEM results clearly showed that the surface of the lining became irregular as the calcium dissolved, and the structure was gradually loosened, which had been initially eroded.…”

“…It was found that the corrosion situation in the NH 4 Cl solution was the most severe. 17 Song and coworkers systematically established three equivalent circuits for simulating different corrosion behaviors, and reported the electrochemical corrosion characteristics of reclaimed water in ductile iron pipes with CML. The results differentiated two corrosion phases: (a) passivation, and (b) initiation and propagation of corrosion.…”

Experimental and Molecular Modeling Computation of Reinforcing Mechanism of Mortar by Polyether Polyol

“…An equivalent electrochemical circuit is a convenient model to analyze EIS data from electrochemical measurements (Zou et al 2018), and its model parameters can be obtained from the fitting of EIS data by using the Zsimpwin fitting software (Sun et al 2018). The fitting result of five specimens for curing 14 and 28 days is listed in Table 3, in which the R s and R ct1 are used to analyze the changes of the microstructure with the curing times of mortar specimens.…”