Following data collection, which step comes next?

• A. Plan monitoring
• B. Rank risk
• C. Evaluate corrosion mechanisms
• D. Identify mitigation options

Answer: (C)

After data collection, the next step is to evaluate corrosion mechanisms. This means analyzing what the gathered information says about how and why corrosion is actually occurring in the system—identifying whether the damage is due to uniform, pitting, crevice, galvanic, microbiologically influenced corrosion, or other modes, and linking those modes to environmental conditions and materials involved. Understanding the mechanisms provides the essential context to interpret the data and informs subsequent decisions, since the likelihood and impact of corrosion, the choice of effective mitigation, and the monitoring strategy all depend on knowing the specific failure mode. Jumping to risk ranking or mitigation planning without clarifying the mechanism can lead to mismatched priorities and ineffective actions.