Effects of propylamine and ethylenediamine intercalation of α-ZrP on the corrosion resistance and tribological properties of electroless Ni-B coatings

Enhancement of the Wear Resistance and Corrosion Resistance of Electroplated Ni–W–B Coatings Using PDA-Functionalized VC

“…The XPS spectrum of W 4f is shown in Figure c, where W 4f 7/2 , W 4f 5/2, W 6+ 4f 7/2 , and W 6+ 4f 5/2 are detected at peak values of 31.47, 35.63, 33.64, and 37.74 eV, respectively . In the XPS spectra of B 1 s, Ni X B compounds were detected at 187.5 eV, and B 2 O 3 /Na 2 B 4 O 7 compounds were detected at 191.7 eV, indicating that the Ni–W–B coating was accompanied by chemical deposition of nickel during electrodeposition. , In the XPS spectra (Figure f) of V 2p, V–C 2P 3/2 and V–C 2p 1/2 are detected at 529.98 and 532.12 eV, indicating that the introduction of the nanomaterials was successful. , Figure g shows that the characteristic peak of C–N is detected at 399.38 eV, which is attributed to the structure of PDA, indicating the successful modification of PDA. In the O 1 s XPS spectra, the characteristic peaks of C–O, Ni–O (W–O), and O–H were detected at 531.94, 530.34, and 533.45 eV, respectively .…”

“…First, VC materials with high hardness are widely used in high-speed iron manufacturing and can withstand grinding ball pressure, and through weak van der Waals forces, PDA wrapped with PDA can reduce the shear force of the friction process. In addition, Bian and Zhao and Yan et al reported that under dry friction conditions, the incorporation of nanomaterials promoted the formation of friction films containing nanomaterials on the coating surface. In this process, because sliding can let the nanomaterials fall off and accumulate, a friction film may further form in a high-temperature environment to prevent the impact of the grinding ball on the coating structure.…”

“…35 In the XPS spectra of B 1 s, Ni X B compounds were detected at 187.5 eV, and B 2 O 3 /Na 2 B 4 O 7 compounds were detected at 191.7 eV, indicating that the Ni−W−B coating was accompanied by chemical deposition of nickel during electrodeposition. 36,37 In the XPS spectra (Figure 7f) of V 2p, V−C 2P 3/2 and V−C 2p 1/2 are detected at 529.98 and 532.12 eV, indicating that the introduction of the nanomaterials was successful. 13,38 Figure 7g shows that the characteristic peak of C−N is detected at 399.38 eV, 39 According to the Hall−Peach relation theory, 42,43 the addition of nanomaterials can refine the grain size, and finer grains can enhance the strength of the coating, increasing the microhardness of the coating.…”

“…First, VC materials with high hardness are widely used in high-speed iron manufacturing and can withstand grinding ball pressure, and through weak van der Waals forces, PDA wrapped with PDA can reduce the shear force of the friction process. In addition, Bian and Zhao 51 and Yan et al 37 reported that under dry friction conditions, the incorporation of nanomaterials promoted the formation of friction films containing nanomaterials on the coating surface.…”

Enhancement of Corrosion and Wear Resistance of Ni–P Coatings Stems from the Synergistic Effects of Cr3C2 and Heat Treatment

“…The impedance curves display capacitive curves, and the coating's corrosion resistance increases with the arc radius. 42 The arc radius of the pure coating is the minimum, which increases with the increase of the Cr 3 C 2 content, and reaches the maximum at a Cr 3 C 2 content of 3 g/ L. After that, when the Cr 3 C 2 content increases further, the circular radius gradually decreases. Naturally, Nyquist plots' circular arcs demonstrated that the charge transfer procedure governed the electrochemical reaction process.…”