Our dry cabinets And dry storage space solutions deliver a small (<0.5%), managed amount of humidity. Moisture absorbing materials such as electronic components, circuit boards, nano materials, contact lenses, laboratory samples along with other susceptible materials are maintained dry and free of water ingress. The dehumidification to under .5% RH qualifies Dry Storage Cabinets not only for limitless safe storage space, but also means they can safely remove dampness, thus resetting floor life without oxidation, even at background temperature ranges.

Options for the storage space of digital components and compositions to prevent two of the biggest problem causes: Oxidation and Diffusion.

The storage space of electronic elements and compositions is challenging, and more and more so as the result of two issues.

Because of rapid modifications in packaging design and material, many companies wind up required to purchase additional amounts of elements to be able to guard against the impact of element obsolescence on their own final product styles. As a result creates a concern of long lasting stock storage space

Product lifecycles have grown to be really brief with new models being released faster than before. However, many producers, like automobile suppliers, should ensure the availability of replacement components including PCBs for as much as ten years. This case also necessitates the advance purchase and extended storage space of elements and materials. Further complicating the problem is that most elements can not be kept for over 10 many years without very special dealing with procedures.

Element micro-cracking caused by the absorption and fast discharge of dampness. The largest threat posed is moisture. This is the reason behind two of the largest problem triggers: Oxidation and Diffusion.

As a result of surface area oxidation, elements and PCB’s can suffer from reduced solderablity, which often leads to total malfunction. Diffusion of vapour and noxious substances within the internal framework in the components or PCB’s may result in long term disintegration of conductor pathways and isolation levels. Both risks could be avoided by correct handling and dried out storage space.

The oxidation procedure – contact corrosion

Within an ultra-dry atmosphere there is absolutely no rust. For corrosion to take place, two needs should be met: there should be a means of oxidation as well as a watering solution, which functions being an electrolyte. The oxygen in the air types the means of oxidation, the vapour (moisture) the electrolyte. The essential limit in which oxidation with oxygen occurs lies as outlined by the steel or alloy at among 40 to 70 % RH. Which means that greater than 8 grams of vapour for each m³ should be existing.

Remedy 1: Dried out Storage Cupboard

The complete humidity in Dry Cabinets For PCB Storage lies at a heat 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 Barrier Hand bags

In humidity safety bags loaded below vacuum with a relaxation pressure of ca. 6 mbar there will be between .1 and .06 g vapour per m³. If the hand bags are full of nitrogen, neither of the two a way of oxidation, neither an electrolyte are available, and oxidation is extremely hard.

The Diffusion process

The vapour inside the atmosphere diffuses into hygroscopic components. The main cause of this is actually the so called vapour pressure – this means the part pressure of the vapour which is found in the environment. The larger the vapour pressure, the quicker the constituents or PCB’s absorb moisture with this the permissible handling time reduces.

All elements classes 2a to 5a according to the category of IPC/JEDEC J-STD020D soak up no moisture having a vapour stress of < 2.82. At this degree they may be stored and processed forever.

ProDry Storage Cupboards maintain more than round the clock typically a vapour stress of < 0.95 mbar reliably and effectively protecting from moisture diffusion. For Moisture Control Cabinets of over 5 years, a combination of the two systems anmtvj recommended. The storage in humidity safety hand bags with nitrogen existing within a simple dried out storage space cabinet with 5 % RH.

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