Why do you want to do a damp heat test? -Huaqiang Electronic Network

Temperature/humidity climate test chamber

Why do you want to do a damp heat test?
In the reliability experiment, the humidity is generally applied to the high temperature section, and the comprehensive effect of the high temperature and the late low temperature should be considered in the analysis of the humidity induced failure mechanism. In terms of mechanical properties, moisture invades the surface of the material into material decomposition, mold growth and deformation. If it acts at the same time as the high temperature, the moisture absorption of the insulating material is accelerated, and even adsorption, diffusion and absorption phenomena and respiration are generated, causing the surface of the material to swell, deform, foam, and become thick, and the friction of the moving parts may increase or even be stuck; Electrically, due to moisture, it is prone to condensation when the temperature changes, resulting in an electrical short circuit.
Surface deterioration of organic materials caused by moisture can also cause deterioration of electrical properties, while moisture at high temperatures can also cause contact contamination of contact parts and poor contact of contacts. The main failure modes induced by humidity are: 1 electrical short circuit; 2 active component jam; 3 circuit board corrosion; 4 surface damage; 5 performance degradation of insulation materials.
In addition, there is a certain correspondence between other types of environmental stresses and types of faults that can be excited. Applying a composite stress in a product reliability test is more effective than adding a single stress to the additive product because the effect of one environmental factor on the product is enhanced with another environmental factor and causes failure. This requires that in the RET of a specific product, it is necessary to deeply analyze the mechanism of the action of various types of stress on various types of defects of the product, and determine the optimal integrated mode of various stresses in RET.
Application of environmental simulation test chambers in various industries, pharmaceutical industry, and biology

Semiconductor Automobile Production Plant Chemical Industry Printed Circuit Board Motorcycle Production Plant Rubber & Plastic Industry Electronic Consumer Products Automotive Support - Accessories Factory Electronic Consumer Products Packaging Automotive Research and Development Center Textile Industry Electronics Industry Automotive Test and Inspection Center Building Materials Industrial Weapons Industrial Ship Industry Aerospace Industry Biological products automation equipment, instrument aviation industry pharmaceutical industry computer army and defense system food packaging communication equipment security and public security system paper products (Zhang) mobile phone production plant education / research / college / institute industrial cigarette (grass) industry

Execution and satisfaction criteria
1.GB/T 11158-2008 high temperature test chamber technical conditions;
2. GB/T 10589-2008 low temperature test chamber technical conditions;
3. GB/T 10592-2008 high and low temperature test chamber technical conditions;
4.GB/T 10586-2006 damp heat test chamber technical conditions;
5.GB/T 5170.1-1995 General rules for the verification of basic parameters of environmental testing equipment for electric and electronic products
6.GB/T 5170.2-1996 Electrical and electronic products environmental testing equipment basic parameters verification method temperature test equipment
7.GB/T 5170.5-1996 Electrical and electronic products Environmental testing equipment Basic parameters verification method Damp heat test equipment
8.GB/T 5170.18-1996 Electrical and electronic products environmental testing equipment basic parameters verification method temperature / humidity combination cycle test equipment
9. GB/T 2421-1999 Environmental testing of electrical and electronic products - Part 1: General
10.GB/T 2422-1995 Environmental Test Terminology for Electrical and Electronic Products
11.GB/T 2423.1-2001 Environmental testing of electric and electronic products - Part 2: Test methods Test A: Low temperature (idt IEC 60068-2-1: 1990);
12. GB/T 2423.2-2001 Environmental testing of electric and electronic products - Part 2: Test methods Test B: High temperature (idt IEC 60068-2-2: 1974);
13. GB/T 2423.3-2006 Environmental testing of electric and electronic products - Part 2: Test method test Cab: constant damp heat test
(IEC 60068-2-78:2001, IDT);
14. GB/T 2423.34-2005 Environmental testing of electrical and electronic products - Part 2: Test method Test Z/AD: Temperature/humidity combined cycle test. (idt IEC 60068-2-38: 1974);
15.GB/T 2423.4-1993 Basic Environmental Test Procedures for Electrical and Electronic Products Test Db: Alternating Damp Heat Test Method
(eqv IEC 60068-2-30: 1980);
16.GB/T 2423.9-1989 Basic Environmental Test Procedures for Electrical and Electronic Products Test Cb: Constant Damp Heat Test Method for Equipment
17.GB/T 2424.1-2005 environmental testing of electrical and electronic products, high temperature and low temperature test guidelines (idt IEC 60068-3-1: 1974);
18. GB/T 2424.2-2005 Electrical and electronic products environmental test damp heat test guidelines (idt IEC 60068-3-4: 2001);
19. GB/T 2424.5-2006 Electrical and electronic products environmental test temperature test chamber performance confirmation (idt IEC 60068-3-5:2001);
20.GB/T 2424.6-2006 Environmental testing of electrical and electronic products temperature / humidity test chamber performance confirmation (idt IEC 60068-3-6: 2001);
21.GB/T 2424.7-2006 Environmental testing of electrical and electronic products - Tests for temperature test chambers A and B (with load)
(idt IEC 60068-3-7:2001);
22.GJB150-1-86 General Rules for Environmental Test Methods for Military Equipment
23.GJB150-3-86 Military equipment environmental test method high temperature test
24.GJB150-4-86 Military equipment environmental test method low temperature test
25.GJB150-9-86 Military equipment environmental test method damp heat test