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CorrDust™ — Surface Dust Corrosivity Test

Is corrosive dust hiding in your data center?

The CorrDust™ kit tests settled surface dust for corrosive chlorides, electrical conductivity and pH — the three factors that determine whether the dust on your racks is a silent corrosion and ESD risk.

EOS/ESD-S4.1 method
International ionic-contamination limits
Swiss laboratory
Order Now — $278 → View Lab Tests
3
Lab-grade tests per kit
$278
Kit price — worldwide shipping included
70%
RH exposure test
Intl. Patents Pending
No specialist required on-site
Worldwide UPS shipping included
Digital report delivered by email
Zurich, Switzerland
Process
How CorrDust™ Works

1. Collect

Wipe the surface dust sampler across a rack or equipment surface. No chemicals, no specialist needed — takes minutes.

2. Mail

Seal the sampler and drop it in the included international postage-paid UPS return mailer. It ships directly to our Swiss laboratory.

3. Analyse

Our lab measures corrosive chlorides, electrical conductivity at 70 % RH, and pH of the collected contamination.

4. Report

Receive a certified digital report covering all three results, Pass/Fail classification, and recommended action — delivered by email.

CorrDust surface dust sampler with international return mailer
Includes Return Mailer
The Kit

Everything You Need
in One Box

One sampler, three lab-grade analyses, no hidden fees. Designed for data centers, server rooms and industrial technical spaces.

  • One Surface Dust Sampler — wipe a rack or equipment surface, no chemicals required.
  • International Postage-Paid Return Mailer — ships worldwide via UPS at no extra cost.
  • Instructions — a short, clear sampling guide so the collection takes minutes and needs no specialist.
  • Certified Swiss Lab Report — corrosive chlorides, conductivity and pH, delivered by email with a Pass/Fail read on each.
Lab Analysis

Three Complementary Tests

Corrosive chlorides quantify the chemical potential for long-term damage. Conductivity at 70 % RH reveals whether the dust is already an ESD risk. pH shows whether conditions favour rapid pitting corrosion. Together, all three give a complete risk picture from one sample.

TEST 01

Corrosive Chlorides

Bresle-equivalent ionic extraction · µg/cm²

The sampler is saturated with a precise volume of deionised water to extract soluble ionic contamination. The extract is measured and converted to chloride surface density — the primary risk indicator for pitting corrosion and PCB trace degradation.

Result Limit Status
< 5 µg/cm² Electronics limit ✓ Pass
5 – 10 µg/cm² Exceeds electronics limit ⚠ Marginal
> 10 µg/cm² Exceeds building/insurer limit ✗ Fail — High risk
Why chlorides? Chlorides, sulfates, nitrates and other soluble ionic contaminants promote corrosion even at low relative humidity. International guidance sets a 5 µg/cm² limit for electronic devices and installations, and a 10 µg/cm² limit for buildings and general installations.
TEST 02

Electrical Conductivity

EOS/ESD-S4.1 · measured at 70 % RH

The sample is exposed to a controlled 70 % relative humidity environment — the threshold at which many salts begin to deliquesce, absorbing moisture and becoming electrically conductive. Resistance is then measured to determine whether the dust poses an immediate ESD risk.

Resistance Classification Status
> 10⁹ Ω Non-conductive, insulating ✓ Pass
10⁶ – 10⁹ Ω Static conductive (ESD) ⚠ Caution
< 10⁶ Ω Highly conductive ✗ Fail — High risk
Interpretation: A reading in the caution range suggests the dust has absorbed enough moisture to become partially conductive — a sign of high hygroscopicity or localised wetting, and a potential ESD risk to live equipment.
TEST 03

pH of Contamination

Aqueous extract measurement · pH scale

The pH of the extracted dust indicates how aggressively it will attack exposed metal surfaces. Acidic contamination in particular can drive extreme corrosion rates and premature pitting, even in small quantities.

Range Character Status
5.0 – 8.5 pH Neutral ✓ Good
> 8.5 pH Alkaline ⚠ Review
< 5.0 pH Acidic ✗ Fail — High risk
Why pH? Between pH 5 and 8.5, contamination has little corrosive impact on most metals. Below pH 5, corrosion rates rise sharply and can cause premature pitting — studies show even small amounts of low-pH contaminant will corrode metal.
The Science

Why Dust in a Data Center Can Be a Ticking Clock

Dust in a technical environment can be entirely benign — or highly corrosive and conductive. The critical variable is its ionic composition. Corrosive dust containing soluble salts sits dormant until environmental relative humidity rises above a threshold, at which point it liquefies and begins attacking metal surfaces.

Dust deliquescence is the process where solid dust particles — particularly those containing soluble salts — absorb moisture from the air and dissolve into a liquid electrolyte. This occurs when the ambient RH exceeds the Deliquescence Relative Humidity (DRH) of the specific salt present. The result: increased particle adhesion, caking of dust layers, and dramatically increased corrosion rates on copper traces and connector surfaces.

A single particle event — a dusty fan, open floor tile, or nearby construction — can deposit months of latent corrosion risk that only manifests after the next humid season.

Test Rationale

Why Three Tests?

No single measurement tells the full story. Together they provide a complete risk picture.

01
Chlorides answer: Will it corrode over time?
Chloride surface density quantifies the chemical potential for long-term damage. Even dust that reads safe on conductivity today can corrode copper traces over months if chloride levels are elevated.
02
Conductivity answers: Is it dangerous now?
By exposing the sample to 70 % RH and measuring resistance, this test reveals whether the dust has already reached its deliquescence point and is actively conductive — an immediate ESD risk to live equipment.
03
pH answers: How aggressive is it?
Acidic contamination corrodes metal far faster than neutral or mildly alkaline dust. pH flags conditions where even modest chloride or moisture exposure can lead to rapid pitting.
EOS/ESD-S4.1
Electrical Conductivity
CorrDust™ conductivity thresholds follow EOS/ESD-S4.1 classification — highly conductive, static conductive (ESD), and non-conductive insulating — measured at 70 % RH.
Ionic Contamination
Chloride Surface Density
Corrosive chloride limits follow international organization and insurer guidance: 5 µg/cm² for electronic devices and installations, 10 µg/cm² for buildings and general installations.
pH 5.0 – 8.5
Corrosion-Neutral Range
Contamination within this range has little corrosive impact on most metals. Outside it — acidic conditions especially — corrosion rates and pitting risk rise sharply.
Pricing

One Kit. One Price.
No Hidden Fees.

A single CorrDust™ kit covers one sampling location, both directions of shipping, and a full Swiss laboratory report against corrosive chlorides, conductivity and pH.

  • One Surface Dust Sampler — collects your sample in minutes.
  • International Postage-Paid Return Mailer — shipped via UPS, worldwide, both ways.
  • Instructions — clear, simple sampling steps, no specialist required.
  • Certified Swiss Lab Report — corrosive chlorides, conductivity and pH, delivered by email.
CorrDust™ Kit
US$278

Worldwide UPS shipping included

Ships worldwide via UPS. Return mailer and Swiss lab analysis included — no additional fees.

Available Online — No Travel Required

Ready to Test Your
Data Center Dust?

Order your CorrDust™ kit today — US$278, worldwide UPS shipping included. Our Swiss-certified specialists will walk you through sampling if you have questions, at no extra cost.

Order Now — $278 → All Products