Effect of Ni-MOF Derivatives on the Electrochemical Corrosion Behavior of Sn-0.7Cu Solders

Abstract

The corrosion resistance of solder joints is a critical factor affecting the service life of electronic products during long-term operation. In this study, the corrosion behavior of Sn-0.7Cu-xNi@C (x = 0, 0.04, 0.08, and 0.12 wt.%) composite solders was investigated using a Tafel polarization curve in 3.5 wt.% NaCl solution, and the result demonstrated that it was the Ni@C that enhanced the corrosion resistance of the composite solder. The corrosion rate of the composite solders decreased with increasing Ni@C content and reached the lowest value of 0.205 mm/y when the content of Ni@C reached 0.08 wt.%. Ni@C changed the morphologies of corrosion products Sn3O(OH)2Cl2 from thick flakes to dense fine needles and flakes, which made it more difficult for Cl– to break down corrosion products. Thus, the corrosion resistance of composite solder was improved. The carbon skeleton in Ni@C served as an inert physical barrier to inhibit further corrosion. Furthermore, the potential difference between IMC and β-Sn decreased with the addition of Ni@C, which reduced the corrosion rate of the electric couple and enhanced the corrosion resistance of the composite solder.

Improvement of Anti‐Corrosion Performance of a Cu‐Ni Bimetallic Organic Framework Smart Coating Using Amino‐Substitution Triazole

“…Multi-metallic MOFs not only have the properties and applications of mono-metallic MOFs, but also provide better physicochemical properties in most applications due to the synergistic effect of multi-metallic. [25][26][27] Also, by changing the ratio of metals used in multi-metallic MOFs, their physical and chemical properties can be changed.. [28][29][30] The purpose of this research is to make a smart coating containing an inhibitor to increase the corrosion resistance of SS in 3.5 % NaCl solution. In this regard, the possibility of encapsulating the 3-amino-1H-1,2,4-triazole (3-AT) in Cu-Ni bimetallic MOF (BMOF), as a smart nanocontainer, has been investigated.…”

“…Also, by changing the ratio of metals used in multi‐metallic MOFs, their physical and chemical properties can be changed. [28–30] …”