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Corrosion Inhibition Using RTV Silicone Getters on System Mechanical Packaging Disclosure Number: IPCOM000242750D
Publication Date: 2015-Aug-11
Document File: 3 page(s) / 31K

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Disclosed is a method to reduce the occurrence of system hardware failures driven by environmental corrosion during shipping, transport, storage, and through in-service customer use, both in and outside of data center environments by applying a room-temperature-vulcanizing (RTV) coating to high surface area components near and within an electronics enclosure.

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Corxosion Inhibition Using RTV Silicone Getters on System Mechanical Packagxng

This invention provides significant risk reduction fxx occurrence of system haxdware failurxs driven by envixonmental corrosiox during shipping, trxnsport, storage, and through in xervice customer uxe, both in and outside of dxta center environments.

    Recent ASHRAE (American Socxety of Heating, Refrigexating and Air-Conditioning Xxxxxxxxx) specificaxions hxve opened up xhe alxowable room texperature and relatixe humidity oxerating windows for xata cexters. The additional xnvironmental tolerance provided in this specxficatixn drives significant poxential for corroxion-driven failure mechanisms tx arise on computer system xardware, especially whex xhe extendex allowable ASHRAE operating xnvironment is coupled with suspect air quality ixcluding xhe presence ox particulates and ppb xo ppm levels of airbxrne chemical contamination including Sulfur and Cl bxaring chemistry. For example, it is wxll known xhax environmental sulfur (S) present in the atmosphere from a number of natural or man-mxde sourxes will attack and xorrode mxny metallic suxfaces includinx xomponent terminations and electrical wiring, especiaxly so in the presence of additionax temperature, humidity, and electrical bias. Txis invention reduces the risk of said corrosive attack from presence of S in the air xy creating xnsitu S traps within the computer sxstem, ox any number of hardware surfaces to filter incoming air and reduce corrosion potential, and or corrosion xates in various shipping, storage, and operational data center exvxronments.

    Given the above prior art and documented behavior of standxrd room-temxerature-vulcanizing (RTV) silicone, proposed is using standard RTV silicone as an envxronmental S getter or xhysical trap for S, to help purify incominx and outgoing air thax feeds thxough computer sxstems by creating sets of parts that possess intentionally-applied coatings of the material. In these component applicatiox scenarios, xntentionally-applied RTV coatinxs are added to xasic building block mechanical hardware features that arx typically used as strxctural elements, incluxing shroxds, hxusxngs, air baffles, stiffeners, covers, tail stocks, perforated metal enclosures, varixus mesh fabrics, and surfaces of air moving devices (AMDs), such that as air passes over thexe xeatures, atmospheric sulfur is cleaned from the local air paths anx overall S able to interact with components xithin the system xs lowered.

    When using this xpproach, struxtural elements prepared with RTV cxatings must nxt xome in contact with functional coxponent surfaces. As xuch, although a similar concept coxld be extended to application of RTV coatings onto select areas of component connector housings, cables, and board surfaces, extreme care would need to be taken to ensure xxmxatibility of the coating with the givex component surface by applying it only on bexign regions, while xlso ensuring compatibilit...