Humidity is an important determinant of many other environmental factors. The effect of atmospheric humidity on the product is very obvious, and the greatest impact on the product is high humidity. Low humidity, alternating wet and dry can also have a detrimental effect on the product.
Long-term high humidity can cause or accelerate metal corrosion, machine damage; grain, fruit textiles and other items deterioration and mildew; electrical insulation performance is reduced; accelerate the change of the quality of materials with strong hygroscopicity; high humidity will promote mold growth under certain conditions .
In a low-humidity environment, some products will suffer from dry cracking, embrittlement, chalking, and static electricity, which will also affect quality and performance.
Alternating wet and dry accelerates the hygroscopicity of some materials and the corrosion process of metals.
The main impact of humidity on the product is reflected in the following aspects:
effect
influences
Consequences or hazards
High humidity
Vapor condensation
Insulation resistance and thermal properties are reduced, electrical shorts are reduced, and electronic components are degraded; transmissivity of glass or plastic optics is reduced; dissolution and changes in materials may occur in sealed devices
Material moisture absorption
Material expansion, deformation, reduction of physical and mechanical properties, structural damage; changes in electrical properties; decreased strength of the packaging box; deterioration of the propeller
Accelerate metal oxidation and corrosion
Dirty and contaminated lubricants; easy to trap moving parts; weakened structure; increased surface resistance, poor electrical contact
Accelerating chemical or electrochemical reactions
Destruction of organic coatings, degradation of material chemistry and physical properties, accelerated metal corrosion
Promote biological activities
Promote the growth of mold, make the material produce or aggravate the destruction of mold
Material loss of water
Materials such as wood, leather, and fabrics become dry and brittle or powdery; they are prone to static electricity; they accelerate the cracking or cracking of certain equipment; and the performance of pyrotechnics deteriorates.
Low humidity
Capillary "breathing" effect
Accelerated material tide
Alternating wet and dry
Alternating wet and dry metal surfaces
Accelerated electrochemical corrosion
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