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The utilization of volatile corrosion inhibitors (VCI) in dry packaging scenarios have become ubiquitous throughout industry for the protection of metal parts during shipping and storage. Initial protective packaging applications of VCIs involved coated paper which was used to wrap or interleave metal parts for transportation and/or storage. This type of wrapping evolved into film packaging where the inhibitors were extruded into film.
Corrosion Inhibitor (VCI) packaging has wide acceptance in the logistics world as an effective means for the protection of metal fabricated parts during shipping and storage. End users still rely on standard jar tests (Mil-Std VIA, TL8135-002, -034 and NACE TM0208-2018) to evaluate their supplier paper and film products. These tests are highly specific to apparatus design and operating conditions. None more important than test specimen alloy type. The narrow scope of these tests makes it difficult to determine if a VCI material will protect a customer's alloy. Herein, we discuss the behavior of various alloys of steel in the German Test Standard TL8135-002.
Alloy K-500 (UNS N05500) is concomitantly a centurial material and the very first precipitation-strengthened nickel-based alloy, then developed in the 1920s by the newly-formed International Nickel Company, or Inco. Derived from Monel 400 (UNS N04400) that was invented in 1901, Alloy K-500 shares many of the same corrosion and tribological characteristics. Being a pioneer alloy with so-called “stain-less” characteristics, AlloyK-500 also established itself as the first high-strength oilfield nickel alloy, having survived sour service conditions exceeding the capabilities of the low-alloy steels of the time. From early naval propeller shaft applications togeneral cross-industrial uses, Alloy K-500 has always been considered a corrosion-resistant alloy, or CRA. For instance, it has been included in the NACE MR1075 document right from the first 1975 edition.
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Natural gas pipelines are subject to internal corrosion. Internal corrosion of steel pipelines can cause natural gas leakage, leading to wasted energy, explosion hazards, and methane emissions. The U.S. Department of Transport reported numerous case histories of corrosion problems and failures in wet gas pipelines. The National Energy Technology Laboratory (NETL) performed an incident survey from 2010 through 2018 and found that 112 (12%) of these incidents in the U.S. transmission lines were caused by internal corrosion.
During drilling operations, the components in the drill string including the bottom hole assembly (BHA) remains in permanent contact with the drilling fluid. Therefore, besides non-magnetic properties and high strength the corrosion resistance of the materials utilized for the BHA plays a decisive role specially in applications involving harsh environments. In fact, strain-hardened CrMn-austenitic steels commonly used in directional drilling technology show a high susceptibility to pitting corrosion and environmentally assisted cracking in drilling fluids with a high chloride (Cl-) content at elevated temperatures.