Rapid and comprehensive method for evaluating pitting resistance of stainless steel pipe welds
US12259313B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2024 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Sep 4, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N17/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosure relates to a rapid and comprehensive method for evaluating pitting resistance of stainless steel pipe welds. Weld samples are collected from different positions of one or more welds on the stainless steel pipe to obtain the surface oxide inclusion density and critical pitting temperature of each weld sample, the surface oxidation inclusion density is taken as an independent variable and the critical pitting temperature is taken as a dependent variable to obtain a fitting function formula between the surface oxidation inclusion density and the critical pitting temperature. The surface oxide inclusion density obtained by adopting the same welding process on the stainless steel pipe to be tested is substituted into the fitting function formula to obtain a standard critical pitting temperature of the weld to be tested. The pitting resistance of the weld of the stainless steel pipe to be tested can be evaluated rapidly, accurately, and comprehensively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.