Corrosion Engineering MCP Server

# Electrochemistry Database # Tafel slopes, exchange current densities, Butler-Volmer parameters # Pre-extracted from corrosion_kb semantic search metadata: extraction_method: "Semantic search + Butler-Volmer calculation" extraction_date: "2025-10-18" source_repos: - repo: "corrosion_kb" ref: "v1.0 (2,980 vector chunks)" url: "Puran Water internal vector database" - repo: "USNavalResearchLaboratory/corrosion-modeling-applications" ref: "master" url: "https://github.com/USNavalResearchLaboratory/corrosion-modeling-applications" source_documents: - "Handbook of Corrosion Engineering" - "NRL polarization curve coefficients (SS316ORRCoeffs.csv, SS316HERCoeffs.csv)" parser_version: "1.0" retrieved_at: "2025-10-18T10:00:00Z" notes: | Electrochemical parameters extracted from handbooks and NRL GitHub data. Values at 25°C unless otherwise noted. Units: - Tafel slopes: V/decade - Exchange current density (i0): A/m² - Transfer coefficient (alpha): dimensionless (0-1) # Base parameters for Butler-Volmer calculations # Used when specific material/electrolyte combo not in reactions database base_parameters: fe_oxidation: reaction: "Fe → Fe²⁺ + 2e⁻" n_electrons: 2 alpha: 0.5 i0_A_per_m2_25C: 1.0e-5 activation_energy_kJ_per_mol: 40.0 source: "Handbook of Corrosion Engineering" notes: "Typical values for Fe oxidation in neutral solution" o2_reduction: reaction: "O₂ + 2H₂O + 4e⁻ → 4OH⁻" n_electrons: 4 alpha: 0.5 i0_A_per_m2_25C: 1.0e-8 activation_energy_kJ_per_mol: 50.0 source: "Handbook of Corrosion Engineering" notes: "Oxygen reduction in alkaline/neutral solution" h2_evolution: reaction: "2H⁺ + 2e⁻ → H₂" n_electrons: 2 alpha: 0.5 i0_A_per_m2_25C: 1.0e-6 activation_energy_kJ_per_mol: 35.0 source: "Handbook of Corrosion Engineering" notes: "Hydrogen evolution in acidic solution" # Specific material/reaction/electrolyte combinations reactions: # Carbon Steel reactions from semantic search findings carbon_steel_fe_oxidation_seawater: material: "Carbon Steel" reaction: "Fe_oxidation" electrolyte: "seawater" ba_V_per_decade: 0.060 bc_V_per_decade: -0.120 i0_A_per_m2: 1.0e-5 alpha: 0.5 n_electrons: 2 temperature_C: 25 pH: 8.2 source: "Handbook of Corrosion Engineering, Fig 3.14" source_document: "Handbook of Corrosion Engineering" extraction_date: "2025-10-18" quality_note: "Standard seawater conditions" carbon_steel_o2_reduction_seawater: material: "Carbon Steel" reaction: "O2_reduction" electrolyte: "seawater" ba_V_per_decade: 0.120 bc_V_per_decade: -0.180 i0_A_per_m2: 1.0e-8 alpha: 0.5 n_electrons: 4 temperature_C: 25 pH: 8.2 source: "Handbook of Corrosion Engineering" source_document: "Handbook of Corrosion Engineering" extraction_date: "2025-10-18" quality_note: "Oxygen reduction on carbon steel in seawater" # Stainless Steel 316 from NRL GitHub data ss316_orr_seawater: material: "Stainless Steel 316" reaction: "O2_reduction" electrolyte: "seawater" ba_V_per_decade: 0.100 bc_V_per_decade: -0.150 i0_A_per_m2: 5.0e-9 alpha: 0.5 n_electrons: 4 temperature_C: 25 pH: 8.2 source: "NRL SS316ORRCoeffs.csv (GitHub)" source_document: "USNavalResearchLaboratory/corrosion-modeling-applications" source_repo: "https://github.com/USNavalResearchLaboratory/corrosion-modeling-applications" source_ref: "master" source_url: "https://raw.githubusercontent.com/USNavalResearchLaboratory/corrosion-modeling-applications/master/polarization-curve-modeling/SS316ORRCoeffs.csv" extraction_date: "2025-10-18" quality_note: "From NRL polarization curve modeling dataset" ss316_her_seawater: material: "Stainless Steel 316" reaction: "H2_evolution" electrolyte: "seawater" ba_V_per_decade: 0.080 bc_V_per_decade: -0.120 i0_A_per_m2: 1.0e-7 alpha: 0.5 n_electrons: 2 temperature_C: 25 pH: 8.2 source: "NRL SS316HERCoeffs.csv (GitHub)" source_document: "USNavalResearchLaboratory/corrosion-modeling-applications" source_repo: "https://github.com/USNavalResearchLaboratory/corrosion-modeling-applications" source_ref: "master" source_url: "https://raw.githubusercontent.com/USNavalResearchLaboratory/corrosion-modeling-applications/master/polarization-curve-modeling/SS316HERCoeffs.csv" extraction_date: "2025-10-18" quality_note: "Hydrogen evolution reaction on SS316" # Stainless Steel 316L (low carbon variant) ss316l_fe_oxidation_seawater: material: "316L Stainless Steel" reaction: "Fe_oxidation" electrolyte: "seawater" ba_V_per_decade: 0.055 bc_V_per_decade: -0.110 i0_A_per_m2: 5.0e-6 alpha: 0.5 n_electrons: 2 temperature_C: 25 pH: 8.2 source: "Handbook of Corrosion Engineering" source_document: "Handbook of Corrosion Engineering" extraction_date: "2025-10-18" quality_note: "316L in seawater, similar to 316 but slightly lower i0" # Freshwater / brine variations (placeholders - to be enriched) carbon_steel_fe_oxidation_freshwater: material: "Carbon Steel" reaction: "Fe_oxidation" electrolyte: "freshwater" ba_V_per_decade: 0.065 bc_V_per_decade: -0.130 i0_A_per_m2: 8.0e-6 alpha: 0.5 n_electrons: 2 temperature_C: 25 pH: 7.0 source: "Handbook of Corrosion Engineering (estimated)" source_document: "Handbook of Corrosion Engineering" extraction_date: "2025-10-18" quality_note: "Freshwater approximation - slightly different from seawater" carbon_steel_fe_oxidation_brine: material: "Carbon Steel" reaction: "Fe_oxidation" electrolyte: "brine" ba_V_per_decade: 0.058 bc_V_per_decade: -0.115 i0_A_per_m2: 1.2e-5 alpha: 0.5 n_electrons: 2 temperature_C: 25 pH: 6.5 source: "Handbook of Corrosion Engineering (estimated)" source_document: "Handbook of Corrosion Engineering" extraction_date: "2025-10-18" quality_note: "High-chloride brine - higher i0 due to conductivity" # Temperature correction guidance temperature_correction: method: "Arrhenius" formula: "i0(T) = i0_ref × exp(-Ea/R × (1/T - 1/T_ref))" notes: | Exchange current density increases with temperature following Arrhenius: - Typical Ea: 35-50 kJ/mol - Tafel slopes also temperature dependent: ba = 2.303 × (RT / αnF) - Current implementation auto-calculates if base_parameters available # Future enhancements enhancements: - title: "pH dependencies" status: "planned" notes: "Add pH correction factors for H+ dependent reactions" - title: "Passivation parameters" status: "planned" notes: "Add passive film breakdown potentials (Epit, Erp)" - title: "More materials" status: "planned" materials_to_add: - "Duplex 2205" - "Super Duplex" - "Alloy 20" - "Hastelloy C-276" - "Titanium Grade 2"