Why Do Electrical Contacts “Go Silent”? – The ASTM B845 Answer With LIB’s Mixed Gas Corrosion Chamber

Aug 22, 2025

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Imagine this: your new relay starts failing, a switch flickers unpredictably, a connector suddenly loses signal.
The root cause? Often, it's not a design flaw. It's the air itself.

Airborne contaminants like sulfur dioxide, hydrogen sulfide, nitrogen oxides, and chlorine are invisible threats. Combine them with heat and humidity, and they can quietly form a thin film of corrosion on contact surfaces, increasing resistance and causing failure.

Fast-Forwarding Time in the Lab

How can engineers uncover these risks before a product hits the market? The industry-standard solution is ASTM B845 – Guide for Mixed Flowing Gas (MFG) Testing of Electrical Contacts.

What it does:

Creates a controlled lab environment of temperature, humidity, and corrosive gases.

Accelerates corrosion so days or weeks simulate months or years of field exposure.

Reveals hidden weaknesses in materials, coatings, or designs.

LIB's Mixed Gas Corrosion Chamber – Built for ASTM B845

Many chambers claim to perform MFG tests. Few deliver the precision, stability, and safety required by high-reliability industries.

LIB's Mixed Gas Corrosion Chamber is engineered specifically for these challenges:

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Accurate multi-gas control – H₂S, SO₂, NO₂, Cl₂, adjustable in ppb-level precision.

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Stable environmental range – 15–80°C and 30–98% RH, meeting ASTM B845 test profiles.

Airflow & safety – 3–10 air changes/hour, SUS316 stainless steel inner chamber, leak alarms, and NaOH exhaust scrubbing for lab safety.

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Data-driven operation – Touchscreen controller, real-time gas monitoring, remote data logging.

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Flexible capacities – Standard 100L–1000L, with custom builds available for unique requirements.

Who Needs This Testing?

Automotive electronics – Relay contacts, sensor terminals, wiring harness connectors.

Telecom and power industries – Switchgear, slip rings, terminal blocks.

Materials R&D – Coating performance, alloy and plating studies.

Why LIB?

Hardware is just the beginning. A solution matters more than a box.

LIB's advantage:

Deep experience with ASTM B845/B827, IEC 60068-2-60 and related standards.

Full support: equipment selection, testing workflows, reporting templates, training.

Proven track record across automotive, electronics, and research sectors.

Let Your Products Survive the Invisible Threats

Customers never see corrosion, but they feel the pain of failures.
LIB's Mixed Gas Corrosion Chamber helps you catch problems early and build reliability into your design.

Ready to strengthen your testing capability? Contact LIB today for a tailored solution.

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