The corrosion resistance of stainless steel parts is not only determined by the grade, but also related to sintering density, pores, carbon and oxygen, heat treatment, machining, cleaning and passivation state.
Interpret the relationships between variables, not a single parameter
Explain how grade, porosity, heat treatment, machining, cleaning, and passivation collectively affect corrosion resistance.
Determine the corrosive environment first
Different media composition, concentration, temperature, cleaning agent, salt spray or circulation conditions have different requirements on materials and surfaces.
Porosity and surface residue can alter results
Sintered pores, grinding contamination, heat treatment scale and cleaning residues may affect the corrosion resistance evaluation, so the specimen status and test methods need to be specified.
Material selection remains fundamental
17-4PH, 440C, 439 have different performance emphasis from austenitic stainless steel. There is a need to choose between corrosion resistance, hardness, strength, cost and manufacturing conditions.
Discuss your powder project
Share the process step, operating conditions and part result you want to improve.
- Current material, powder or part issue
- Process step and observed symptom
- Available particle-size, composition, dimensional or performance data
- Equipment, process conditions and desired outcome
Technical references for this page
These references explain materials, processes or test methods. Third-party product data does not represent Tongcheng product specifications.