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corrosion-materials-selector skill

/plugins/babysitter/skills/babysit/process/specializations/domains/science/chemical-engineering/skills/corrosion-materials-selector

This skill recommends corrosion-resistant materials based on process conditions, mechanisms, and standards to ensure equipment reliability and lifecycle cost

npx playbooks add skill a5c-ai/babysitter --skill corrosion-materials-selector

Review the files below or copy the command above to add this skill to your agents.

Files (1)
SKILL.md
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---
name: corrosion-materials-selector
description: Materials selection skill for corrosion resistance based on process conditions and industry standards
allowed-tools:
  - Read
  - Write
  - Glob
  - Grep
  - Edit
  - Bash
metadata:
  specialization: chemical-engineering
  domain: science
  category: Process Design
  skill-id: CE-SK-031
---

# Corrosion Materials Selector Skill

## Purpose

The Corrosion Materials Selector Skill recommends materials of construction based on process conditions, corrosion mechanisms, and industry standards to ensure equipment reliability.

## Capabilities

- Corrosion mechanism identification
- Material screening
- Corrosion rate estimation
- Corrosion allowance calculation
- Material specification development
- Isocorrosion curve analysis
- Galvanic compatibility assessment
- Stress corrosion cracking evaluation
- Cost-benefit analysis

## Usage Guidelines

### When to Use
- Selecting materials for new equipment
- Evaluating corrosion failures
- Assessing process changes
- Specifying replacement materials

### Prerequisites
- Process conditions defined
- Chemical composition known
- Operating temperature/pressure specified
- Design life established

### Best Practices
- Consider all corrosion mechanisms
- Use conservative assumptions
- Reference industry standards
- Validate with experience data

## Process Integration

This skill integrates with:
- Equipment Sizing and Specification
- Process Flow Diagram Development
- HAZOP Study Facilitation

## Configuration

```yaml
corrosion-materials-selector:
  standards:
    - NACE
    - API
    - ASME
  material-classes:
    - carbon-steel
    - stainless-steel
    - nickel-alloys
    - non-metallics
```

## Output Artifacts

- Material recommendations
- Corrosion assessments
- Material specifications
- Cost comparisons
- Design life estimates

Overview

This skill recommends materials of construction focused on corrosion resistance using process conditions and industry standards. It delivers ranked material choices, expected corrosion behavior, and specification-ready outputs to support reliable equipment design. Use it to reduce failure risk and align selections with NACE, API, and ASME guidance.

How this skill works

Provide process conditions (chemistry, temperature, pressure), expected service life, and operating scenarios. The skill identifies relevant corrosion mechanisms, screens material classes, estimates corrosion rates and allowances, and evaluates galvanic and stress corrosion cracking risks. Outputs include concise material recommendations, specification templates, cost-comparison summaries, and design-life estimates.

When to use it

  • Selecting materials for new pressure vessels, piping, or heat exchangers
  • Investigating and specifying replacement materials after corrosion failures
  • Assessing material suitability when process chemistry or operating conditions change
  • Preparing material specifications to meet NACE, API, or ASME requirements
  • Estimating corrosion allowance and maintenance intervals during design

Best practices

  • Provide complete process chemistry and concentration data for accurate screening
  • Consider all relevant corrosion mechanisms rather than a single dominant type
  • Use conservative corrosion-rate assumptions for safety-critical equipment
  • Cross-check recommendations with site experience and lab corrosion coupons
  • Reference applicable industry standards and include qualification tests

Example use cases

  • Choosing piping materials for a chloride-containing seawater system with elevated temperature
  • Specifying metallurgy for a sour-gas service to mitigate H2S-related cracking
  • Evaluating whether to upgrade carbon steel to duplex stainless or nickel alloy for longer life
  • Producing a material specification package for procurement, including tests and acceptance criteria
  • Running a cost-benefit comparison of corrosion-resistant alloys versus increased maintenance and replacement

FAQ

What inputs are required for a reliable recommendation?

At minimum provide detailed chemical composition of the process stream, temperature, pressure, flow regime, expected contaminants, and desired design life.

Does the skill replace laboratory testing?

No. The skill narrows choices and defines candidate materials and tests; laboratory coupons and qualification testing remain essential for final selection.