Our dry cabinets And dry storage space options deliver a small (<0.5%), managed amount of humidity. Moisture absorbent components such as electronic elements, circuit boards, nano fibers, contact lenses, laboratory samples and other vulnerable materials are kept dry and free of water ingress. The dehumidification to lower than .5% RH is eligible Moisture Control Cabinets not merely for limitless secure storage, but additionally indicates they can safely eliminate dampness, therefore resetting floor life without oxidation, even at ambient temperature ranges.
Solutions for the storage space of digital components and compositions in order to avoid two of the most popular defect causes: Oxidation and Diffusion.
The storage of digital components and compositions is problematic, and increasingly so as the result of two issues.
Due to fast alterations in packaging design and materials, a lot of companies end up forced to buy additional amounts of elements to be able to guard from the impact of component obsolescence on the last product styles. As a result produces a concern of long lasting stock storage
Product lifecycles have become very short with new designs being released sooner than before. However, many producers, including vehicle providers, must ensure that the accessibility to replacement parts such as PCBs for up to 10 years. This example also necessitates the advance purchase and prolonged storage of components and components. Further complicating the problem is that most elements can not be kept for longer than 10 years without very special handling procedures.
Component mini-cracking caused by the absorption and rapid discharge of dampness. The largest threat posed is humidity. This is the reason behind two of the largest defect triggers: Oxidation and Diffusion.
Because of surface oxidation, elements and PCB’s can are afflicted by decreased solderablity, which frequently brings about complete failure. Diffusion of vapour and noxious substances in the inner framework from the elements or PCB’s may result in long term disintegration of conductor paths and solitude levels. Each risks may be prevented by proper dealing with and dry storage space.
The oxidation process – contact corrosion
Within an ultra-dried out atmosphere there is not any corrosion. For rust to happen, two demands has to be met: there has to be a means of oxidation along with a watering remedy, which works as being an electrolyte. The oxygen in the atmosphere types the way of oxidation, the vapour (moisture) the electrolyte. The essential limit where oxidation with o2 occurs is situated in accordance with the metal or alloy at between 40 to 70 % RH. Because of this greater than 8 gr of vapour for each m³ should be present.
Solution 1: Dried out Storage Cupboard
The complete moisture in Dry Storage Cabinets For Optics is situated with 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 Bags
In moisture safety hand bags packed under vacuum using a relaxation pressure of ca. 6 mbar you will have between .1 and .06 g vapour per m³. Once the bags are loaded with nitrogen, neither a means of oxidation, neither an electrolyte can be purchased, and oxidation is extremely hard.
The Diffusion process
The vapour within the environment diffuses into hygroscopic materials. The cause of here is the so called vapour pressure – this implies the part stress of the vapour which can be contained in air. The larger the vapour pressure, the quicker the ingredients or PCB’s absorb moisture with this the permissible processing time decreases.
All components classes 2a to 5a according to the category of IPC/JEDEC J-STD020D absorb no moisture with a vapour pressure of < 2.82. Around this degree they may be stored and refined forever.
ProDry Storage Cupboards sustain over round the clock on average a vapour stress of < 0.95 mbar reliably and effectively protecting from moisture diffusion. For Dehumidifying Dry Cabinets in excess of 5 years, a combination of the 2 techniques anmtvj recommended. The storage in moisture safety bags with nitrogen present within a easy dried out storage cabinet with 5 % RH.