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Technical Papers

Gateway Arch_photo

Case Study of The Gateway Arch

This is a summary of the St. Louis Gateway Arch conservation research and planning project sponsored by the Getty Foundation. It provides a comparative analysis of high pressure water, laser, and chemical cleaning for corrosion remediation and preservation of a historic stainless steel structure.

ProcessDecisionTree - Passivation - Astro Pak

Process Decision Tree

Find out which solution (Clean, Derouge, Passivate, Electrolytic Clean, Electropolish) is right for you


Corrosion in Clean Steam Systems

This paper examines the latest findings on corrosion in clean steam systems.

BlackWipe Case Study - Astro Pak

Black Residue Success Story

Success story about how Astro Pak helped a food and beverage company remove the black residue on the surface of a newly installed vessel.

BlackWipe Case Study - Astro Pak

Case Study of Black Residue

A case study examining the components found in the black residue of newly mechanically polished stainless steel

Passivated Steel

Comparison of Passivation Modalities

An independent analysis of results produced by three passivation methods.

Citric Acid - Tech Paper

Passivation of Aerospace SS Parts with Citric Acid

Read Boeing’s evaluation comparing the effectiveness of citric vs. nitric acid solutions.


Understanding the Passive Layer

A technical summary about passivation and the passive layer.


Passivation Process that Maintains Laser Mark Integrity

Published on MedicalDeviceNow.com, this paper outlines the most optimal passivation process for laser marked medical devices in order to maintain mark integrity while restoring the passive layer to prevent corrosion.

Passivation Methods

Current Methodoligies of Passivation

Learn the latest passivation best practices.


Comparing Passivated vs. Electropolished 316L SS Surfaces

This paper examines the effects of passivation vs. electropolishing in the semiconductor device manufacturing.



Efficacy of Citric Acid Gel Passivation on Welds

Published in Ultra Pure Water, this study looks at the efficacy of a gel-based citric acid chelant passivation agent on welds and heat-affected zones.


New Developments in Passivation Technology

Presented at Interphex 1999, many of the passivation developments cited are still relevant today.