Corrosion or Temperature Resistance? Choose the Right Test Chamber for Your Products

    In product reliability testing, test chamber selection directly determines result value. While composite salt spray and high-low temperature test chambers are both environmental test equipment, their applications differ greatly. This guide helps you quickly select suitable equipment by testing requirements, application scenarios and core parameters.

I. Clarify Core Requirements First: What Problem Do You Need to Solve?

The first selection step is clarifying the core purpose—verifying "corrosion resistance" or "temperature change resistance", the essential difference between the two.

1. Choose Composite Salt Spray Test Chamber: When Focusing on "Corrosion Resistance Reliability"

For products exposed to high-salt/humid environments or relying on coatings/platings, the composite salt spray test chamber is ideal. It simulates marine/coastal industrial corrosion environments to accurately assess protective system durability.

Typical Requirement Scenarios:

① Coastal-used automotive parts (prevent coating peeling/rusting)

②Galvanized hardware (confirm salt spray corrosion resistance duration)

③ Marine engineering equipment (test overall salt corrosion resistance)

2. Choose High-Low Temperature Test Chamber: When Focusing on "Temperature Change Stability"

    For products working in extreme/frequent temperature changes, the high-low temperature test chamber is essential. It simulates high-low temperature cycles to detect functional failures and structural deformations caused by temperature shifts.

Typical Requirement Scenarios:

• Mobile phone batteries (test low-temperature discharge performance)

• Industrial controllers (ensure high-temperature parameter stability)

• Outdoor instruments (assess temperature-induced shell cracking risk)

II. Quick Matching by Industry and Product Type

Product characteristics in different industries determine testing priorities. The following classifications enable quick selection.

1. Industries and Products Prioritizing Composite Salt Spray Test Chamber

Core feature: Products in high-salt environments or with protective coatings as key quality indicators.

• Automotive: Body parts, chassis components, electroplated decorations

• Hardware Electroplating: Galvanized/chromium parts, tools, sanitary hardware

• Marine/Shipbuilding: Ship parts, marine equipment, port machinery

• Outdoor Equipment: Communication base stations, PV brackets, lamp housings

2. Industries and Products Prioritizing High-Low Temperature Test Chamber

Core feature: Product performance sensitive to temperature or requiring extreme temperature adaptability.

• Electronics: Chips, circuit boards, sensors, home appliances

• New Energy: Lithium batteries, PV modules, energy storage devices

• Military/Aerospace: Military electronics, aerospace components

• Medical Devices: Portable medical equipment, outdoor emergency tools

III. Key Parameter Checklist for Selection

After confirming the general direction, match key parameters to avoid cost waste or insufficient performance.

1. Composite Salt Spray Test Chamber: Focus on "Corrosion-Related Parameters"

• Salt Spray Type: NSS/ASS/CASS (select per standard; CASS for automotive parts)

• Deposition Rate: 0.5-2mL/(80cm²·h) (comply with test standards)

• Additional Functions: Temperature-humidity cycle/drying (as needed)

• Chamber Material: PVC/PP (strong corrosion resistance)

2. High-Low Temperature Test Chamber: Focus on "Temperature Change-Related Parameters"

• Temperature Range: Conventional -70℃~150℃ (extendable for special needs)

• Change Rate: 5℃/min (rapid) for impact resistance; conventional for daily tests

• Humidity Function: Temperature-humidity type (if needed); pure high-low temperature otherwise

• Chamber Volume: Ensure product fit with ≥5cm wall distance (temperature uniformity)

IV. Selection Pitfalls: Common Misunderstandings

• Misunderstanding 1: Avoid redundant functions—no complex temperature control for salt spray tests; no humidity function for temperature-only tests

• Misunderstanding 2: Match parameters to actual needs—overly wide temperature ranges increase costs unnecessarily

• Misunderstanding 3: Comply with industry standards (e.g., ISO 9227 for automotive) to ensure valid results