Ammonium nitrate is frequently added to the wash mix to minimize the risk of chloride stress corrosion cracking (Cl-SCC) caused by impurities in the wash water. 3. Dry Air Purging and Desiccants
The standard emphasizes that the best protection often starts with selecting materials and fabrication practices that are resistant to sensitization in the first place, thus lowering the overall risk of PTA SCC. How to Acquire the NACE SP0170 PDF nace sp0170 pdf
: The temperature of the steel must remain consistently above the ambient water dew point. By completely preventing the condensation of liquid water, polythionic acid cannot form, even in the presence of oxygen. 3. Alkaline Washing (Neutralization) Ammonium nitrate is frequently added to the wash
NACE SP0170 PDF is a widely adopted standard for corrosion prevention and control in the oil and gas industry. The standard provides guidelines for corrosion prevention, detection, and mitigation. By implementing the guidelines outlined in NACE SP0170 PDF, industries can prevent corrosion, reduce costs, and ensure safety and environmental protection. It is essential to follow best practices for implementation, including training and awareness, regular inspection and maintenance, corrosion monitoring, and continuous review and update. By doing so, industries can ensure the integrity of their equipment and prevent corrosion-related failures. How to Acquire the NACE SP0170 PDF :
If washing with liquid solutions is impractical or could damage downstream catalysts, NACE SP0170 allows for environmental isolation using dry nitrogen.
Certain process units are more susceptible to PTA SCC and thus require strict adherence to NACE SP0170. These are typically units in the 'sulfur train' of a refinery, including: