GB/T 38265.3-2022 specifies the methods for determining the acid number of soft soldering fluxes, detailing both potentiometric titration and visual titration approaches, applicable to specific types of soft soldering flux testing. The standard defines the test principles, reagents, procedures, and data processing requirements, with key instruments including balances, titrators, pH meters, electrodes, and stirrers. The potentiometric titration method determines the titration endpoint by monitoring changes in electrode potential, while the visual titration method relies on indicator color change to identify the endpoint. Both methods involve titrating the sample solution with a standard potassium hydroxide solution and calculating the acid number accordingly, providing a unified technical basis for quality control of soft soldering fluxes and evaluation of soldering performance.
| Status | Active | ||
|---|---|---|---|
| CCS | J33 | ICS | 25.160.50 |
| Release Date | 2022-10-12 00:00:00 | Implementation Date | 2022-10-12 00:00:00 |
