Research Progress of Fluorescent Probes for Metal Corrosion Detection

doi:10.12068/j.issn.1005-3026.2025.20240196

Abstract

Abstract:

The traditional methods of metal corrosion detection have the disadvantages of complex operation， inability to perform real-time monitoring， and high costs， while the fluorescent probe has the advantages of high sensitivity， simple structure， non-destructive detection， in-situ detection， real-time detection， etc. It is a promising method for monitoring the early corrosion of metal， which can independently indicate the coating damage and metal corrosion in the early corrosion stage of metal. The principle of fluorescent probe in monitoring corrosion were reviewed according to the corrosion process of metal， and the fluorescent probes were classified into three categories： pH-sensitive， metal ion-sensitive， and coating damage-sensitive， which display fluorescent reaction according to the change in pH， the presence of metal ions， and the damage of coatings as an early warnings of the beginning of corrosion. The application scenarios， advantages， and disadvantages of different types of fluorescent probes were summarized， and finally， the development prospects of fluorescent probe monitoring technology were predicted.

Key words: fluorescence, probe, corrosion detection, metal, coating

CLC Number:

TG 174

Qi ZHU, Chao-fan DING, Jun-li YAN, Tao ZHANG. Research Progress of Fluorescent Probes for Metal Corrosion Detection[J]. Journal of Northeastern University(Natural Science), 2025, 46(8): 93-104.

Figures/Tables 10

Fig.1 Mechanisms of metal corrosion and detection[7]

Fig.2 Corrosion inhibition and early warning mechanism of coatings loaded with phenolphthalein and corrosion inhibitors [8]

Fig.3 Damage warning and repair mechanism of intelligent coating loaded with Zr-MOF@CD@MBI nanofillers in metal corrosion [17]

Fig.4 Fluorescence mechanism and fluorescence emission of FD1 in acidic environments and images of FD1-contain-ing transparent epoxy-coated Al 1052 after immersion in 3.5% NaCl solution for different days [20]

Fig.5 Reaction mechanism of Phen with Fe2+ and its effect on properties of coated samples[23]

Fig.6 Excitation of ethanol solutions of S-Rxbxja different contents of Fe3+ under different light sources[32]

Fig.7 RBA fluorescence switching mechanism and coating corrosion detection performance[30]

Fig.8 Optical and UV images of Q235 steel loaded with CDs-APhen after immersion in HCl solution [37]

Fig.9 Complexation of 8-HQ with aluminum ions and fluorescence early-warning properties of coatings containing probes of different concentrations [42]

Fig.10 Mechanism of self-warning and self-repair of epoxy/PAN@(HDI+TPE) fiber coatings and images of coatings after immersion in 3.5 wt% NaCl solution for different duration[46]

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