Short answer: Atmospheric corrosion is the slow attack metals suffer from air, moisture and pollutants; ISO 9223 classifies it from C1 (dry indoor) to C5 (marine/industrial) so you can pick the right alloy, coating and thickness for the site.
At a Glance
Classifying the Air
Corrosivity rises with chloride and pollutant load; match it to Metal Corrosion Inhibitor Guide und Metal Corrosion Monitoring Guide. Avoid mismatches with Galvanic Corrosion Guide.
Choosing Protection
Higher classes need more zinc (Zinc Plating Vs Galvanizing) or barrier coat; estimate loss with Metal Corrosion Rate Calculation Guide and rank metals via Galvanic Series Guide.
QA & Supply
Document alloy and coating per Mill Test Certificate Guide and protect stock via How To Prevent Metal Rust. HXSCO supplies site-matched metal and coatings.
Get a Quote
Tell HXSCO your requirements and we will respond with a competitive quote and lead time.
Häufig gestellte Fragen
Metal loss driven by air, moisture and pollutants on exposed surfaces.
The corrosivity of an atmosphere from C1 (mild) to C5 (severe).
C4 to C5 — high chloride raises the attack rate.
Use marine alloys plus heavy coating and planned thickness allowance.
HXSCO supplies alloys and coatings matched to your corrosivity class.
Source Site-Matched Metal from HXSCO
HXSCO supplies alloys and coatings matched to your ISO 9223 corrosivity class with certificates. Send your site and quantity for a quote.