Search Results for corrosion resistance

In this study, 316L stainless steel samples were plasma nitrided for 64 h at 370-420 °C then subjected to surface hardness and pitting corrosion testing. The results show that interstitial hardening with nitrogen significantly improved the surface hardness as well as the pitting corrosion resistance of the austenitic stainless steel.

Outdoor enclosures for telecom equipment are often made from aluminum, but with the protective treatments described in this two-part article series, inexpensive steels can serve in the same capacity. Zinc-based galvanizing and aluminizing treatments, which were presented in Part 1, may be used alone or together with corrosion-resistant paints, pretreatments, and sealants described here. This article also assesses the corrosion resistance and adhesion properties of different combinations of steels, coatings, and pretreatments by means of salt fog spray testing.

High-strength, corrosion-resistant steel is proposed as a cost-effective alternative to titanium alloys due to its high specific strength, high fatigue strength, good toughness, and corrosion resistance.

Outdoor enclosures for telecom equipment are often constructed from powder-coated aluminum, but with appropriate surface treatments, hot and cold rolled steel can serve in the same capacity at a lower cost. This article, the first of a two-part series, discusses the intrinsic corrosion behavior of hot and cold rolled steel and how it can be modified through galvanizing and aluminizing treatments. Part 2, scheduled for the October 2012 issue of AM&P , covers nonmetallic surface treatments and presents corrosion test results.

This introduction to the metallurgy of flatware describes the grades and qualities of metals used in typical cutlery and the reasons to choose one set over another.

Corrosion is commonly defined as the deterioration of a material or its properties because of a reaction with its environment. It is a natural process due to a high energy state induced in metals and alloys during refining, processing, and manufacturing. Modern methods for preventing and controlling corrosion can reduce or eliminate its impact on public safety, the economy, and the environment. New technologies push materials to withstand increasingly demanding conditions as a result of higher temperatures and pressures, and environments with greater corrosivity. Therefore, the risks of new types of corrosion failures need to be considered along with methods to avoid them, as described in this article.

A new fusion cladding process that uses high-intensity arc lamps can produce pinhole free, smooth, uniform coatings as thick as 15 mm from various feedstock materials. This article briefly describes the process and the corrosion, wear, and high-temperature behavior of fusion claddings designed for oil and gas pipelines and related components.

Novel bcc CoCr-base alloys exhibit a Young’s modulus similar to human bone combined with superelastic strain twice that of NiTi alloys.

Beyond weight savings, aluminum products offer corrosion resistance, weldability, and ease of maintenance for a wide range of marine vessels. Aluminum was recognized as a promising material for marine construction from the early days of the industry. The development of 5xxx alloys and large production capacity made aluminum use more technically and economically possible beginning in the 1950s. The variety of aluminum vessels ranges from small fishing boats and fast ferry catamarans to cruise ships and military vessels. All benefit from aluminum's relatively light weight, low maintenance costs, and easy repairability. Other benefits of using aluminum in marine applications include formability, corrosion resistance, and availability in various product forms.

New FDA guidance for Nitinol used in medical devices includes clarification on the determination of safety factors, the requirements for corrosion testing, and proper labeling of potentially harmful elements.

The continually increasing demand for new energy will likely be met through a combination of traditional and emerging energy platforms. While technology needs for traditional oil and gas production differ greatly from the needs of emerging power generation platforms, such as solar, wind, fuel cells, and batteries, a common need among all these sources or energy is advanced materials. Tantalum surface alloys enable advancements in traditional and new energy production methods.

As copper’s antimicrobial benefits spur new applications, the metal’s other properties are also worth reviewing. Along with strength, fatigue resistance, and ability to take a good finish, the primary selection criteria for copper and its alloys are electrical conductivity, thermal conductivity, corrosion resistance, color, ease of fabrication, and antimicrobial benefits.

Newly developed nickel-titanium (NiTi) alloys are well suited for bearings and gears in demanding applications.

The unique metallurgy and microstructure of Cu-Ni-Sn spinodal alloys provide a combination of strength, toughness, hardness, and corrosion resistance, suiting them for applications ranging from bearings, bushings, and friction surfaces in all sorts of machinery to electrical connectors and EMI shielding gaskets.

Nanostructured tungsten-tungsten carbide chemical vapor deposition (CVD) coatings provide a practical, technical, and commercially viable alternative to hard chrome plating for aircraft components.

Efforts are underway in every sector of the scientic community to explore and develop possible strategies and solutions to counter sea level rise and climate change. Near-term materials science implications include improvements to corrosion-resistant materials and coatings.

Given the demonstrated antimicrobial properties of copper, it is incumbent upon materials scientists to design potent antimicrobial copper-containing stainless steels as an economical option.

Integrated computational materials engineering has proven effective in shrinking materials development timelines and accelerating the implementation of new materials in manufactured components. This article presents examples of aerospace alloys developed using ICME techniques and provides a glimpse of future applications.

Aluminum-silicon (Al-Si) alloys have good castability in combination with high corrosion resistance, thermal conductivity, and specific strength, making them a strong candidate for many automotive applications. This article describes the processes used in the production of die-cast AlSi9Mg engine brackets for Volvo trucks, the effects of solution treatment temperature on Si particle size, and the benefits of Mg additions on yield strength and heat treatability.

The corrosion of structural materials and control of coolant chemistry are key factors that impact the lifetime of nuclear reactors and the development of future reactors. This article reviews corrosion issues in four reactor concepts that use vastly different coolant types: light water reactors, lead fast reactors, high temperature gas-cooled reactors, and fluoride salt-cooled high temperature reactors.