Integripedia Topic
Sulfuric Acid Corrosion
Sulphuric Acid Corrosion is an acidic environment "disease" commonly occurring in sulfuric acid alkylation units where process control or water contents of acids deviate from design operation. As with HF alkylation units, sulfuric acid carryover into equipment and piping systems that were not constructed to resist sulfuric acid at certain concentrations and temperatures can lead to higher corrosion rates. Reactor effluent lines, reboilers, deisobutanizer overheads, caustic treating systems, and flare lines are particularly vulnerable. However, with rigid control of acid concentration, fluid velocity, temperature and the avoidance of acid carryover, sulfuric acid alkylation units can be operated reliably with high integrity.
Related Topics
- Amine Stress Corrosion Cracking (SCC)
- Ammonia Stress Corrosion Cracking
- Brittle Fracture
- Carburization
- Caustic Stress Corrosion Cracking (Caustic Embrittlement)
- Cavitation
- Chloride Stress Corrosion Cracking
- Cooling Water Corrosion
- Corrosion Fatigue
- Corrosion Under Insulation (CUI)
- Cracking
- Decarburization
- Embrittlement
- Erosion Corrosion
- Fatigue (Material)
- Graphitization
- High Temperature Hydrogen Attack (HTHA)
- Hydrochloric (HCl) Acid Corrosion
- Hydrofluoric (HF) Acid Corrosion
- Hydrogen Blistering
- Hydrogen Embrittlement
- Hydrogen Induced Cracking (HIC)
- Hydrogen Stress Cracking
- Liquid Metal Embrittlement (LME)
- Metal Dusting
- Microbiologically Induced Corrosion (MIC)
- Naphthenic Acid Corrosion (NAC)
- Phosphoric Acid Corrosion
- Polythionic Acid Stress Corrosion Cracking (PASCC)
- Spheroidization (Softening)
- Stress Assisted Corrosion
- Stress-Oriented Hydrogen Induced Cracking (SOHIC)
- Sulfidation Corrosion
- Thermal Fatigue
- Vibration-Induced Fatigue
- Wet H2S Damage
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September/October 2004 Inspectioneering JournalBy John Reynolds at Intertek
Unlike NAC where we’re still on a learning curve, the knowledge of corrosion by sulfuric acid has not changed much in the last quarter century, and there are many good references for it included in API RP 571.
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NewsUS Chemical Safety Board, August 15, 2014
The U.S. CSB released a report on tubing samples taken from the Tesoro Refinery in Martinez, California, concluding that a sulfuric acid spill resulted from insufficient tightening between a tube and a compression joint at a sulfuric acid sampling...
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