High-Purity Tubing & Fitting Passivation Services
At Cardinal UHP, we specialize in nitric acid passivation for stainless steel tubing and fittings, delivering enhanced corrosion resistance and surface integrity—even for components that are not electropolished. Our precision-controlled process is engineered to meet the stringent cleanliness and performance standards of the semiconductor, biopharmaceutical, and high-purity laboratory industries.
Our passivation process is meticulously managed to optimize every critical parameter:
- pH balance
- Temperature control
- Flow rate
- Suspended particulate filtration
- Dwell time
This ensures the formation of a robust, chromium-rich passive layer that significantly improves the corrosion resistance and longevity of stainless steel components. We are equipped to handle a wide range of geometries and configurations, including long lengths of coiled tubing, elbows, tees, reducers, and custom fittings.
Whether you're preparing components for ultra-high purity gas delivery, cleanroom environments, or sterile pharmaceutical processing, Cardinal UHP delivers consistent, validated results that meet or exceed industry specifications such as ASTM A967 and SEMI F19.