Passivation & Pickling Services

As a provider of advanced coating and finishing services, National Plating Company passivates & pickles stainless steel. Our passivation process utilizes nitric acid to remove surface impurities such as free iron. This is accomplished with state-of-the-art systems that are equipped with temperature controllers and timers which ensure process integrity. This is augmented by both pre- and post-cleaning of all passivated parts.

Because we deliver this service to so many industries we can provide full compliance with a wide range of finishing standards including ASTM A967, QQ-P-35, ASTM A380, AMS 2700, and various Mil-specs. We are capable of treating parts up to 6' in length, and 3.5' in height and width. Our facility is geared for volumes from 1 to 100,000 parts weighing up to 500 lbs. In addition to inspection capabilities we also offer part testing with copper sulfate, ferroxyl, water immersion, and 24 hour humidity testing. After the passivation process is complete we also offer additional services such as part counting, packing, labeling, bar coding, and shipping to the customer's requested destination. At National Plating Company our advanced technology and over 100 years of experience provide quality part passivation above and beyond customer expectations.

For more information on our passivating capability, see the table below, or contact us directly.

Passivation Example Photo Gallery

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Precision Machined 316 SS

• The Part: Precision machined & Ground 316 SS
• Approx Size: 3.5" x 5" x 1.5", 6 lb.
• Scope: Passivate per ASTM A-967 - No damage to any surface allowed

Formed & Welded Pipe Assembly

• The Part: Formed & welded pipe assembly 316 SS
• Approx Size: 4" ID; 60" long, 60 lb.
• Scope: Passivate inside & outside

Welded, Machined & Ground 316 SS

• The Part: Welded, machined & ground 304 SS
• Approx Size: Major ID ~3" 14"L, 10 lb.
• Scope: Passivate inside and outside

Machined Sand Casting 316 SS

• The Part: Machined sand casting 316 SS
• Approx Size: 6" x 6" x 10", 14 lb.
• Scope: Passivate complete &Ferroxyl Test

Various Spring Sizes

• The Part: Springs 302, 304, 17-4, 17-7 SS
• Approx Size: Wide variety of sizes & shapes.
• Scope: Passivate complete & Ferroxyl Test

Stamped & Formed 304 SS

• The Part: Stamped & formed 304 SS
• Approx Size: 12" Dia. x 3" High, 3 lb.
• Scope: Passivate complete & Ferroxyl Test

Welded/Shaped 316 SS Vessel

• The Part: Welded/shaped vessel 316 SS
• Approx Size: Major OD 12" x 40", 90 lb.
• Scope: Passivate complete-thorough rinsing of inside surfaces is critical

Precision Turned/Ground 316 SS Roller

• The Part: Precision turned/ground roller 304 SS
• Approx Size: 1.1"OD x 18"L, 5 lb.
• Scope: Passivate complete-absolutely no surface damage allowed

Precision Machined & Ground 316 SS

• The Part: Precision machined & ground 316 SS
• Approx Size: Major dia. 1.5" x 1.7" L, .2 lb.
• Scope: Passivate complete-small part no damage allowed on precision surfaces

Passivation Capabilities