 STAINLESS STEEL PASSIVATION
Passivation is the removal of exogenous iron or iron compounds from a stainless steel surface by means of a chemical dissolution. Passivation is accomplished by removing surface contaminates in a chemical bath without significantly affecting the stainless steel. After the parts have been run through the passivation bath, a passive film is spontaneously formed. This passive film improves the corrosion resistance of the stainless steel.
Stainless steel passivation improves the condition of part surfaces by dissolving iron that is embedded in the surface during part forming or machining. If the embedded iron is allowed to remain, the iron will corrode and give the appearance of rust spots on the stainless steel.
Benefits of Stainless Steel Passivation Include:
- Improve corrosion resistance without plating
- Superior clean surface
- Eliminates iron contamination reactions with other materials
- No discoloration from rust
- A clean surface prepared for priming and painting
*No dimensional change
Arrow Cryogenics certifies to many passivation and cleaning specifications, including the following:
| AMS 2700 |
AMS-QQ-P-35 |
ASTM A380 |
ASTM B117 |
| ASTM B912 |
ASTM F86 |
CGA G-4.1 |
MIL-F-14072D |
| ASTM B849 |
AMS-QQ-P-35 |
MIL-S-13165C |
MIL-STD-171D |
| MIL-STD-753B |
MIL-STD-753C |
MIL-STD-808A |
WS19168A |
| 1E4347 |
1E2860 |
JDS-G169 |
A967 |
These are just some of the specifications Arrow Cryogenics certifies to. Please contact Arrow Cryogenics to inquire about other specifications.
Testing for the detection of free iron and cleanliness.
After parts have been passivated Arrow Cryogenics has the capability to test parts for free iron on the surface.
The most commonly used test methods used to test for free iron at Arrow Cryogenics are:
High Humidity Test Salt Spray Test Copper Sulfate Test
Certification
When requested Arrow Cryogenics will provide certification of passivation and testing.
Request information about passivation of stainless steel. Arrow Cryogenics also offers sample processing for ultrasonic cleaning, laser marking and electropolishing of stainless steel. |
