Galvanic Corrosion Risk Checker
Potential difference between coupled metals and the severity verdict.
Steel screws in aluminium sheet: the aluminium dies. Aluminium rivets in steel: the rivets die FAST (small anode). Painting the anode concentrates attack at scratches โ coat the cathode instead.
Formula
Galvanic Corrosion Risk Checker is a free galvanic corrosion for design engineers, metallurgists and QA inspectors โ instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Galvanic Corrosion Risk Checker
Potential difference between coupled metals and the severity verdict. The calculation implements ฮV from the galvanic series (seawater, SCE); area ratio multiplies attack (ASTM G82 โ galvanic series guide). Steel screws in aluminium sheet: the aluminium dies. Aluminium rivets in steel: the rivets die FAST (small anode). Painting the anode concentrates attack at scratches โ coat the cathode instead.
How to use Galvanic Corrosion Risk Checker
- 1Enter Metal 1 potential in V (SCE) (Zn โ1.03 ยท Al โ0.79 ยท mild steel โ0.61 ยท Cu โ0.18 ยท 316SS โ0.05 ยท graphite +0.25).
- 2Enter Metal 2 potential in V (SCE).
- 3Enter Cathode/anode area ratio (Big cathode + small anode = worst case).
- 4Read Potential difference, Which corrodes (more negative) instantly โ no submit button needed.
Why use Galvanic Corrosion Risk Checker?
- โImplements the standard formula โ ฮV from the galvanic series (seawater, SCE); area ratio multiplies attack
- โReference cited on-page: ASTM G82 โ galvanic series guide
- โBuilt-in engineering verdict flags out-of-range results instantly
- โRuns entirely in your browser โ nothing uploaded, free forever
Frequently asked questions
What formula does the Galvanic Corrosion Risk Checker use?+
It computes ฮV from the galvanic series (seawater, SCE); area ratio multiplies attack, per ASTM G82 โ galvanic series guide. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Steel screws in aluminium sheet: the aluminium dies. Aluminium rivets in steel: the rivets die FAST (small anode). Painting the anode concentrates attack at scratches โ coat the cathode instead.
Where do the material property defaults come from?+
Defaults are standard handbook values (ASM, manufacturer datasheets, the cited standard). Always substitute certified values from your material's test certificate for critical work.
Is the Galvanic Corrosion Risk Checker free to use?+
Yes โ completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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