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Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media

Metal Corrosion and the Efficiency of Corrosion Inhibitors in Less Conductive Media

Published on: November 3, 2018

Corrosion in bioprocessing applications.

¹Merck Research Laboratories, Rahway, NJ, USA. beth_junker@merck.com

Bioprocess and Biosystems Engineering

|May 31, 2008

Summary

This summary is machine-generated.

This study details corrosion in a bioprocessing pilot plant, evaluating stainless steel alloy resistance to conditions like sterilization and cleaning. Implementing best practices improved vessel longevity.

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Area of Science:

Bioprocessing Engineering
Materials Science
Corrosion Science

Background:

Bioprocessing facilities rely on stainless steel equipment, but corrosion can compromise integrity.
Alloy composition significantly impacts corrosion resistance under bioprocessing conditions.
Understanding corrosion mechanisms is crucial for maintaining equipment longevity.

Purpose of the Study:

To evaluate the corrosion resistance of stainless steel alloys in a 25-year-old bioprocessing pilot plant.
To identify common corrosion forms, their causes, and susceptibility of different alloys.
To assess the impact of bioprocessing conditions and chemical agents on corrosion progression.

Main Methods:

Analysis of stainless steel alloy properties and composition.
Investigation of corrosion forms like pitting, crevice corrosion, and intergranular attack.
Evaluation of corrosion resistance against specific bioprocessing media, chemicals, and temperature variations.

Main Results:

Variations in alloying elements significantly affect stainless steel corrosion resistance.
Pitting, crevice corrosion, and intergranular attack were identified as key concerns.
Corrosion susceptibility was linked to specific media components, pH adjusters, and organic by-products.

Conclusions:

Best practices in fabrication (welding, heat treatment) and operation (sterilization, cleaning) minimize corrosion.
Developed assessment and repair strategies enhanced vessel and facility lifespan.
Material selection and process control are critical for mitigating bioprocessing corrosion.