Passivation Selector – Stainless Steel

Passivation Selector (Stainless Steel)

Select the stainless steel grade family and application, and this tool suggests a suitable nitric or citric passivation route with typical bath parameters and optional verification tests. Use it as structured guidance to align your passivation practice with ISO/ASTM style methods and customer requirements.

This selector gives typical nitric / citric passivation options and test ideas. Always check the latest ASTM / ISO / AMS standards and drawing notes before locking down a process.

Step 1

Process Context

Describe the stainless grade and where it will be used.

Stainless grade family *	Choose the closest family. This mainly affects nitric vs citric preference and test suggestions.
Exact grade / spec	Used for reference only in the output – the rules are driven by the family and application.
Application / sector *
Chemistry preference *	This only steers the recommendation – the customer specification still takes priority.
Surface condition / history
Notes / constraints

Fields marked * are used by the rule engine. The exact grade and notes will simply be echoed into the summary.

Output 1

Recommended Passivation Route

Nitric vs citric recommendation with context and cautions.

Method selection

Select the grade family, application and chemistry preference above, then click Generate Recommendation to see a suggested nitric / citric route.

Output 2

Typical Bath Parameters

Indicative concentration, temperature and time ranges.

Typical nitric / citric bath options

Recommendations will appear here after you run the selector. Values are shown as typical ranges – always cross-check with the controlling specification.

Output 3

Verification & Optional Testing

Suggested checks to confirm passivation performance.

Suggested tests & checks

After running the selector, this section lists simple shop-floor checks plus optional laboratory tests (e.g. copper sulfate, humidity or salt spray) that are commonly used with stainless passivation specifications.