CCT Cyclic Corrosion Test Chamber

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Technical Parameters

Model

CZZ-1000D

CZZ-1600D

CZZ-2000D

Inner Dimension WxHxD(mm)

1200x800x1000

1600x800x1000

2000x800x1000

Outer Dimension WxHxD(mm)

2250x1720x1220

2950x1720x1220

3550x1900x1220

Test chamber temperature range

20℃~70℃

Saturated barrel temperature range

RT~70℃

Humidity range

20%~98%RH

Salt spray amount

1.0~2.0ml/80cm²/h (collect for at least 16 hours and take the average value)

Spray pressure

70~170KPa

Sample placement angle

20°±5°

Rapid alternation process of dry and wet salt spray

Salt spray test can be set arbitrarily from 1min to 99h;

Drying test can be set arbitrarily from 1min to 99h;

The damp heat test can be set arbitrarily from 1min to 99h;

Spray pattern

Continuous spray, periodic spray, circulating spray can be selected

Control accuracy

Temperature deviation: ±2.0℃;

Temperature deviation: ≤+2-3%RH when ≥75RH;

Humidity deviation: ≤±5%RH when <75%RH

Box material

Inner titanium plate, outer stainless steel plate with paint

Cooling method

Water cooling

Control system

Siemens PLC + Siemens temperature module + human-machine interface

Power supply conditions

AC380V 50Hz (60Hz customized) three-phase four-wire + protective grounding

Application

The combined salt spray test, also known as the cyclic corrosion test (CCT), is primarily used in the automotive industry. Based on the constant salt spray test, it incorporates parameters such as high temperature, humidity, low temperature, and dryness, taking into account as many factors as possible in the natural environment to achieve test results that are more closely related to the natural environment. The combined salt spray test is designed to determine the ability of the test object to withstand a salt spray environment. It utilizes a cycle of salt spray and moisture to simulate actual operating conditions. It is suitable for evaluating the electrochemical corrosion effects of metal materials and salt particles.

Test Description

Combined salt spray testing typically consists of three phases: a salt spray phase, a humid phase, and a dry phase.
● Salt spray phase: Generally, in addition to sodium chloride (NCI), electrolytes containing other chemicals may be used to simulate acid rain or other industrial corrosion.
● Humid phase: The test procedure typically requires high humidity conditions, with a relative humidity requirement of 95%.
● Dry phase: The sample drying phase typically maintains a relative humidity of ≤30%.

Results Evaluation

Product functionality must be normal. Failure of any function or performance exceeding the design margin is considered unacceptable.
Corrosion resulting in a 25% or greater reduction in any structural physical property (including but not limited to key product parameters such as yield strength, hardness, penetration strength, mass, and bending resistance) is considered unacceptable.
Exposed surfaces should be corrosion-free. Neither the coating nor the substrate should be corroded. There should be no bubbles, cracks, or other defects that affect the product's appearance.
Non-exposed surfaces and the substrate should be corrosion-free. Corrosion depth of the coating should not exceed 5% of the surface, and the corrosion area should not exceed 10%.

Dry and Wet Salt Spray Rapid Alternation Process

CCT Cyclic Corrosion Test Chamber

Meets the Test Standards

● DO160E/F/G Salt Spray Test Requirements
● GB/T20854-20071S014993-2001 Corrosion of Metals and Alloys - Accelerated Tests by Cyclic Exposure to Salt Spray, Dry and Wet Conditions
● GB/T24195-2009/1S016151:2005 Cyclic Accelerated Corrosion Test in Acidic Salt Spray, Dry and Wet Conditions
● GJB150.11A-2009 Laboratory Environmental Test Methods for Military Equipment - Salt Spray Tests
● GB/T2424.17-2008/1EC60068-2-11:1981 Salt Spray Test Method
● GB/T2423.18-2012/1EC60068-2-52:1996 Sodium Chloride Alternating Salt Spray Test Method
● GB/T2423.3-2006/1EC6008-2-78-2001 Test cab: Steady-state damp heat test method
● GB/T10125-2012/1S09227-2006 Artificial atmosphere corrosion test - Salt spray test
● GB/T31467.3-2015 Lithium-ion power battery packs and systems for electric vehicles - Part 3: Safety requirements and test methods: Salt spray test
● ASTM B117, ASTM B368
● GB/T10587-2006 Technical requirements for salt spray test chambers
● GBT10586-2006 Technical requirements for damp heat test chambers
● GB/T5170.8-2008 Test methods for environmental testing equipment for electrical and electronic products - Salt spray test equipment

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