Evaluation of Corrosion Durability of Nickel-Based Alloy Alloy Tubing

Quantification of corrosion resistance of nickel alloy metallic pipes

Quantitative Relationships Between Alloying Elements and Corrosion Resistance in Nickel-Based Alloys for Sour Gas Environments

## Quantitative Relationships for Stress Corrosion Cracking (SCC) Resistance

SCC in sour gas contains anodic dissolution at crack methods coupled with cathodic hydrogen evolution, with thresholds explained through K_th (strain depth issue, MPa√m) or da/dt (m/s). For Ni alloys, K_th >50 MPa√m is required in line with NACE MR0175 for bitter service. Cr complements SCC resistance by means of thickening the passive film (δ_film ∝ 0.1*Cr μm), lowering crack tip acidity, even though Mo inhibits hydrogen recombination (us