Menu
Search
Filters
Close
Menu

Organic corrosion inhibitors for the prevention of stress corrosion cracking in 5XXX-series aluminum

Picture for Organic corrosion inhibitors for the prevention of stress corrosion cracking in 5XXX-series aluminum
Available for download

5XXX-series aluminum has been used in multiple naval vessels because it offers excellent strength to weight ratios, weldability and low cost. Although 5XXX series aluminum alloys generally provide excellent corrosion resistance, exposure to moderately elevated temperatures (e.g., solar exposure) results in sensitization due to precipitation of the beta phase (Mg2Al3) at the grain boundaries. The sensitization of marine grade aluminum and subsequent material degradation due to stress corrosion cracking (SCC) and intergranular corrosion (IGC) is a severe problem, causing expensive repairs and out of service time.

Product Number: 51323-19223-SG
Author: Lauryn Baranowski, Ron Cook, Jeannine Elliott, Brian France, Trudy Scholten, Justin Feis, Morgan Sibbald, Douglas Hines, John York, Mark Schultz, Veronica Lemmerman
Publication Date: 2023
$0.00
$20.00
$20.00

We have developed a new coating to prevent the corrosion and cracking of marine grade aluminum. The key to this approach is a new class of corrosion inhibitors, developed using a combination of computational modeling and performance testing. These additives can prevent stress corrosion cracking (SCC) and intergranular corrosion (IGC) of sensitized 5XXX-series alloys. These additives are incorporated into an existing, commercially available marine-grade coating. This new chemistry uses active organic inhibitors that release slowly and continually from the coating, passivating the sensitized metal to prevent intergranular corrosion and SCC. This technology allows even sensitized aluminum alloys to perform similarly as new unsensitized aluminum. The coating also incorporates an advanced resin system and pigment package designed to reduce the coating’s surface temperature and weight. By lowering the surface temperature, the coating will delay if not completely prevent the sensitization of the metal. The corrosion resistance and other coating properties have been verified using in-lab tests, extended shoreside outdoor exposure testing, and shipboard testing. After 14 months of shipboard testing, the coating was still in excellent condition, and showed minimal to no signs of deterioration. The coating that includes the optimized corrosion inhibitor additives has been submitted for MIL-PRF-24635 approval.

We have developed a new coating to prevent the corrosion and cracking of marine grade aluminum. The key to this approach is a new class of corrosion inhibitors, developed using a combination of computational modeling and performance testing. These additives can prevent stress corrosion cracking (SCC) and intergranular corrosion (IGC) of sensitized 5XXX-series alloys. These additives are incorporated into an existing, commercially available marine-grade coating. This new chemistry uses active organic inhibitors that release slowly and continually from the coating, passivating the sensitized metal to prevent intergranular corrosion and SCC. This technology allows even sensitized aluminum alloys to perform similarly as new unsensitized aluminum. The coating also incorporates an advanced resin system and pigment package designed to reduce the coating’s surface temperature and weight. By lowering the surface temperature, the coating will delay if not completely prevent the sensitization of the metal. The corrosion resistance and other coating properties have been verified using in-lab tests, extended shoreside outdoor exposure testing, and shipboard testing. After 14 months of shipboard testing, the coating was still in excellent condition, and showed minimal to no signs of deterioration. The coating that includes the optimized corrosion inhibitor additives has been submitted for MIL-PRF-24635 approval.

Product tags
Also Purchased
Picture for Stray Current Interference Simulation and Mitigation Associated with Light Rail Transit (LRT) Systems and Adjacent Metallic Pipelines – A Case Study
Available for download

Stray Current Interference Simulation and Mitigation Associated with Light Rail Transit (LRT) Systems and Adjacent Metallic Pipelines – A Case Study

Product Number: 51323-18926-SG
Author: Boshra Momen Nejad, Jeffrey Delorme, Brandon Miller
Publication Date: 2023
$20.00

During operation of DC rail transit systems, DC current will follow the path of least resistance when returning to the Traction Power Substations (TPSS) to complete the electrical circuit. If the track-to-earth resistance (resistance between the train rails and surrounding soil) is not sufficient, current can leak off the LRT track system into the surrounding soil. Metallic facilities such as pipelines in the soil offer lower resistance paths for the current while returning to the TPSS.
Picture for Characterizing Properties and Stress Corrosion Cracking Resistance of Alloy 718 via Additive Manufacturing
Available for download

Characterizing Properties and Stress Corrosion Cracking Resistance of Alloy 718 via Additive Manufacturing

Product Number: 51323-19117-SG
Author: Karthik Krishnan
Publication Date: 2023
$20.00

UNS N07718 (Alloy 718) is a precipitation-hardened Nickel alloy widely used for various components in oil and gas production service where a combination of high strength, good cracking and corrosion resistance is needed. API 6ACRA provides heat treatment windows and acceptance criteria for wrought Alloy 718 in these oil and gas production environments, in which the heat treatment is intended to obtain high strength desired for applications in combination with good environmental performance.


Additive Manufacturing (AM) is increasingly becoming a source of design, fabrication of complex components where machining from wrought material would be very cumbersome or introduced complicated welding processes.
Picture for 11094 Black Powder Inhibitors - Performance Study
Available for download

11094 Black Powder Inhibitors - Performance Study

Product Number: 51300-11094-SG
ISBN: 11094 2011 CP
Author: Abdelmounam M. Sherik, Arnold L Lewis, AbdulJalil H Rasheed and Ali Jabran
Publication Date: 2011
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support