Our dry cabinets & dry storage options deliver a low (<0.5%), controlled level of humidity. Moisture absorbing materials such as digital elements, circuit panels, nano materials, contact lenses, laboratory samples as well as other vulnerable components are kept dried out and free from water ingress. The dehumidification to lower than .5% RH qualifies Moisture Control Cabinets not merely for unlimited safe storage space, but in addition means they can securely eliminate moisture, thus resetting flooring life without having oxidation, even at ambient temperatures.
Options for the storage of digital components and compositions in order to avoid two of the biggest defect causes: Oxidation and Diffusion.
The storage of electronic components and compositions is challenging, and increasingly so as the result of two issues.
Due to rapid modifications in packaging design and materials, many companies wind up compelled to purchase additional quantities of components in order to shield up against the effect of component obsolescence on the last product styles. As a result produces a concern of long term stock storage
Product lifecycles have become very brief with new models coming out faster than ever before. However, numerous producers, such as automobile providers, must ensure the accessibility of substitute components including PCBs for approximately 10 years. This example also necessitates the advance purchase and prolonged storage of elements and components. Further complicating however , most elements cannot be kept for over 10 years without very special dealing with procedures.
Element mini-cracking caused by the absorption and fast release of dampness. The greatest threat posed is moisture. It will be the cause of two of the biggest problem triggers: Oxidation and Diffusion.
Because of surface oxidation, elements and PCB’s can have problems with decreased solderablity, which regularly leads to complete failure. Diffusion of vapour and noxious substances inside the internal framework of the components or PCB’s can result in long term disintegration of conductor paths and solitude levels. Each risks may be avoided by correct handling and dried out storage space.
The oxidation process – contact rust
In an ultra-dried out environment there is no corrosion. For rust to take place, two needs has to be fulfilled: there has to be a method of oxidation along with a watering remedy, which functions being an electrolyte. The oxygen inside the air types the method of oxidation, the vapour (humidity) the electrolyte. The critical limit at which oxidation with o2 happens is situated according to the steel or alloy at between 40 to 70 % RH. This means that a lot more than 8 grams of vapour per m³ must be existing.
Solution 1: Dry Storage space Cupboard
The complete humidity in Dry Storage Cabinets For Optics lies in a temperature of 20 °C and <2%RH with less than 0.35 g/m³. Under these conditions no cathode reaction is present and no oxidation can take place.
Solution 2: Dampness Buffer Hand bags
In moisture safety hand bags loaded below vacuum using a rest stress of ca. 6 mbar you will see among .1 and .06 g vapour per m³. When the hand bags are full of nitrogen, neither of the two a means of oxidation, neither an electrolyte can be purchased, and oxidation is impossible.
The Diffusion process
The vapour in the environment diffuses into hygroscopic components. The main cause of this is actually the what are known as vapour pressure – what this means is the partial pressure of the vapour which is contained in the air. The higher the vapour stress, the quicker the ingredients or PCB’s absorb humidity and with this the permissible handling time reduces.
All components courses 2a to 5a in accordance with the classification of IPC/JEDEC J-STD020D soak up no moisture with a vapour stress of < 2.82. At this particular level they may be stored and refined indefinitely.
ProDry Storage space Cabinets sustain more than twenty four hours normally a vapour stress of < 0.95 mbar reliably and effectively protecting from moisture diffusion. For Moisture Control Cabinets of over 5 many years, a combination of the two systems anmtvj suggested. The storage space in moisture protection bags with nitrogen existing within a easy dried out storage space cupboard with 5 % RH.