Salt Spray Water Condensation Aeration

Cyclic Climate Tests (CCT)



What is a Cyclic Climate Test?

The CCT tests has been developed to evaluate the corrosion protection predominantly in the automotive inductry by using accelerated laboratory tests. The idea behind the CCT tests is to simulate the actual conditions in which the vehicles are normally being used. These tests are cyclic in nature, meaning that the test specimens are exposed to changing climates over time. Tests cpecimen are plased in an test chamber and exposed to essentially four type of climates: 

  1. Salt spray in accordance with DIN EN ISO 9227 (NSS, ESS or CASS)
  2. Water condensation according to DIN EN ISO 6270-2 (CH, AT or AHT)
  3. Aeration with room air or air according to ISO 554 (for VW PV1210)
  4. Forced drying with warm air acording to GMW 14872

The number of cycles is repeated and therefore is the total test duration variable.


CCT 1000-TL

CCT 1000-FL

CCT test cabinets

VLM offers several versions of front and top loading test chambers being able to prerform CCT tests. The volumes of these chambers vary from from 400 L up to 3500 L. The most cost effective design uses the JUMO IMAGO® multichannel program controller.

For maximum convenience it is possible to chose for an expandable and future-proof alternative based on VLM's ClimaCORR® technology built around Beckhoff PLC.

Applicable Standards

DIN EN ISO 11997-1 Zyklus B (Ersatz für VDA 621-415)
VW PV 1210

DIN EN ISO 9227, NSS, ESS, CASS

DIN EN ISO 6270-2 CH, AHT

ASTM B 117, ASTM 368, ASTM 2242

VDA Test Flow