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๐Ÿ›ก๏ธ Corrosion-Resistant Alloys - Complete Guide

Selection, performance modeling, and specification of alloys engineered to withstand aggressive chemical or environmental exposure.

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Corrosion-Resistant Alloys - Complete Guide

Corrosion-resistant alloys are special metals designed to resist rust and decay when exposed to harsh chemicals, saltwat...

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Quick Start

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Knowledge Base

15 pages
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Key Concepts

Corrosion-Resistant AlloysPREN Calculation & InterpretationASTM G48 Testing ProtocolGalvanic Series RankingSCC in Ni Alloys: Chloride vs. CausticCrevice Corrosion in Duplex SteelsCPT/CCT DeterminationPassive Film Formation

Visual overview of key concepts and their relationships

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Real Projects

4 cases
FlowlineUNS S32760PREN โ‰ฅ 40RiserCS + N08825 CladISO 21457 / M-001CPCorrosion Threatsโ€ข Sour Service SCCโ€ข Pittingโ€ข Microbial CorrosionASTM G48-F40ยฐC, 72hฮ”W < 0.1 mg/cmยฒCathodic Protection(Applied to both)

Selecting Material for Offshore Pipeline

Subsea gas export pipeline in Norwegian North Sea (120 km, 22 MPa, 120ยฐC, high Hโ‚‚S/COโ‚‚)

Challenge: Simultaneous threats of sour service SCC, pitting, and microbial corrosion under...
Aluminum for Aerospace ComponentsChallengeโ€ข IGC & Exfoliation in 7075-T6
โ€ข Improper anodizing & fastenersSolutionโ€ข 2024-T351 + CAA
โ€ข Ti-6Al-4V fasteners
โ€ข Insulating washers
ValidationASTM B117 (salt spray)
ASTM G34 (EXCO test)
Key Metricsโ€ข Galv. current: 0.8 ยตA/cmยฒ
โ€ข EXCO rating: โ‰ค EA2
IGCExfoliationCAATi fasteners

Aluminum for Aerospace Components

Fuselage skin panels for next-gen narrow-body aircraft (exposed to deicing salts, humidity cycling, galvanic coupling with Ti fasteners)

Challenge: Intergranular corrosion (IGC) and exfoliation in 7075-T6 due to improper anodizi...
Stainless Steel in Food ProcessingChloride-Induced Pitting MitigationHAZPitting2205 Duplex SSOrbital GTAWPickling +Electro-PassivationASTM A967CPT โ‰ค 120 ppm@ 85ยฐC, pH-adjustedPassivation Index:โ‰ฅ60 sec (CuSOโ‚„ test)

Stainless Steel in Food Processing

High-pressure CIP (Clean-in-Place) system for dairy processing plant (85ยฐC, 2% NaOH, 1% HNOโ‚ƒ, 500 ppm chlorine residual)

Challenge: Chloride-induced pitting in weld heat-affected zones (HAZ) of 316L vessels leadi...
Composite-Metal Interface Isolation SystemComposite(e.g., CFRP)Metal(e.g., Al alloy)Interface ZoneEpoxy PrimerGlass Flake BarrierDielectric GasketI = 0.03 ยตA/cmยฒClโป < 15 ppmat 10 yr (Fickian)ASTM D1141 +Cyclic Salt Fog!Galvanic Corrosion

Composite Materials for Wind Turbines

Offshore wind turbine tower transition piece (carbon fiber/epoxy composite bonded to S32750 super duplex flange)

Challenge: Galvanic corrosion at composite-metal interface due to seawater ingress and cath...
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Learning Path

22 lessons

Master Corrosion-Resistant Alloys through a structured learning path โ€” from fundamentals to advanced applications.

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