碳钢挂片:ΔW=50,ρ=7.85,A=20 cm²,t=720 h → CR≈0.0388 mm/a 30 天浸泡:CR=87.6×50/(7.85×20×720)=0.0388 mm/a,mpy=1.526。等级:良(1–5 mpy)。{"result":"Corrosion rate CR = 87.6 × 50 / (7.85 × 20 × 720) = 0.0388 mm/a. mpy = 0.0388 × 39.37 = 1.526. Rating: good (0.025–0.12 mm/a, 1–5 mpy) — indicative NACE band for carbon steel.","metadata":{"input":{"massLoss":50,"density":7.85,"area":20,"time":720},"result":{"corrosionRateMmPerYear":0.0388,"corrosionRateMpy":1.526,"rating":"good"}}}
304 不锈钢:ΔW=2,ρ=8.0,A=15 cm²,t=8760 h → CR≈0.000167 mm/a 一年浸泡:CR=87.6×2/(8×15×8760)=0.000167 mm/a,mpy=0.00656。等级:优(<1 mpy)。{"result":"Corrosion rate CR = 87.6 × 2 / (8.0 × 15 × 8760) = 0.000167 mm/a. mpy = 0.00656. Rating: excellent (<0.025 mm/a, <1 mpy) — indicative NACE band for carbon steel.","metadata":{"input":{"massLoss":2,"density":8,"area":15,"time":8760},"result":{"corrosionRateMmPerYear":0.000167,"corrosionRateMpy":0.00656,"rating":"excellent"}}}