Material Testing Articles

  • Beyond Laboratory Research on White Rust and Passivation

    EVAPCO initiated an in-depth study to investigate the formation and control of white rust. This study, which began over three years ago, led to the development of industry-leading research equipment specifically designed to evaluate white rust formation on evaporative heat transfer surfaces. A small-scale closed circuit cooler was designed and built to replicate the dynamic conditions ...


    By Evapco Inc.

  • Lynn L. Bergeson Quoted In Bloomberg BNA Daily Environment Report Article “Paper Waste Spurs Testing of Low-Cost Carbon Fiber for Products”

    On August 28, 2017, Lynn L. Bergeson, Managing Partner of Bergeson & Campbell, P.C. (B&C®), was quoted by the Bloomberg BNA Daily Environment Reportdiscussing Toxic Substance Control Act (TSCA) regulatory concerns for carbon fiber with a lignin. Since the lignin-PAN carbon fiber under development does not yet involve the use of carbon nanofibers, ...


    By Bergeson & Campbell, P.C.

  • Assessing methods for estimating roughness coefficient in a vegetated marsh area using Delft3D

    A Delft3D-FLOW model was used to simulate tidal flow in Davis pond marsh in Louisiana, USA. The study area is a freshwater marsh consisting of one main channel and floodplain. Vegetation-induced flow resistance greatly influences tidal flow dynamics in the marsh. This study evaluated eight approaches to estimate vegetation roughness, including two constant Manning's n values, four empirical ...


    By IWA Publishing

  • Monitoring the effectiveness of advanced sorption materials for removing selected metals from water

    There are a number of ways to remove heavy metals from water. Sorption on granular media based on iron oxides and hydroxides is currently the most used option. The experiment was carried out using sorption materials GEH, CFH 0818, CFH 12 and Bayoxide, which are primarily designed to remove arsenic from water. Four columns were prepared with an inner diameter of 4.4 cm for the purpose of the ...


    By IWA Publishing

  • Permeation testing of flexible food packaging films - Case Study

    FFP Packaging Solutions specialise in high quality printed and plain flexible packaging, heat seal lidding films and films for high temperature/oven use. Offering the food industry innovative flexible packaging solutions, FFP ensure that all the film materials used have been vigorously tested to ensure that the quality of the packaging is stable when used in different environmental conditions ...


    By Systech Instruments Ltd

  • Types of UV Light for Different Applications

    Types of UV Light for Different Applications Ultraviolet (UV) radiation was discovered in 1801 when the German physicist Johann Wilhelm Ritter observed that invisible rays just beyond the violet end of the visible spectrum darkened silver chloride-soaked paper more quickly than violet light itself. He called them "oxidizing rays" to emphasize chemical reactivity and to ...


    By Larson Electronics LLC

  • What is Cross Flow Velocity?

    Q: What is Cross Flow Velocity?   A: Cross flow velocity (CFV) is the linear velocity of the flow tangential to the membrane surface and is reported in [m/sec] or [ft/sec]. CFV affects fouling rate and formation of concentration polarization at membrane surface and is calculated by dividing the volumetric flow rate [lpm or ...


    By Sterlitech Corporation

  • Laboratory test report - the effect of scale formation on heat transfer coils

    Background EVAPCO, Inc. recently introduced new Evaporative Condensers and Closed Circuit Coolers which utilize extended surface coils. For decades extended “fin” surfaces have been used on heat transfer coils, often referred to as “finned coils” primarily in an effort to increase dry capacity. However, in the past the fin material was limited to carbon steel tubes ...


    By Evapco Inc.

  • Choosing the Right Geocell

    Not all geocells are created equal. While most manufacturers can provide similar-looking written specifications, you need assurances that the material delivered for your project is of the high quality that you expect. Important factors in the success of your geocell project include: Quality The geocell material is proven, strong, and will last ...


    By Presto Geosystems

  • Optimus® Fired Up for Rocket Noise Testing Project - Case Study

    Airborne Engineering Limited (AEL) specialises in measurement, testing and research; particularly of advanced rocket propulsion systems. One of AEL’s principle services is carrying out static tests of rocket engines for other aerospace companies. AEL is based at Westcott Venture Park, formerly the Rocket Propulsion Establishment, and operates two test bunkers, purpose built in 1949 for ...


    By Cirrus Research plc

  • Impact of surface condition and roughness on sediment formation: an experimental sewer system operated with real wastewater

    Regular sewer cleaning in North Rhine-Westphalia (Germany) generates annual costs of around 50 million Euros. This leads to the question of whether and to what extent sewer cleaning is necessary. To determine the effect of roughness, sewer surface condition and discharge, experiments with real wastewater were performed, using a sewer test track with acrylic glass tubes (DN 300) prepared with ...


    By IWA Publishing

  • Creep not a factor for Geocell load support

    An accurate understanding of creep resistance is essential to proper material selection when using polymers, and in the case of geocells, this science is being misapplied.  The definition of creep deformation is the tendency of a solid material to move slowly or deform permanently under the influence of mechanical stress.  Creep is something that creates fear and uncertainty with all ...


    By Presto Geosystems

  • A smartphone camera for the structure from motion reconstruction for measuring soil surface variations and soil loss due to erosion

    The suitability of a smartphone camera for the structure from motion (SfM) reconstruction for monitoring variations in soil surface characteristics and soil loss originated by a low intensity erosive event was evaluated. Terrestrial laser scanning (TLS) was used to validate the SfM model. Two surveys of the soil surface, one before and one after the rainfall event, were carried out for SfM and ...


    By IWA Publishing

  • Nanoscale Fe/Ag particles activated persulfate: optimization using response surface methodology

    This work studied the bimetallic nanoparticles Fe-Ag (nZVI-Ag) activated persulfate (PS) in aqueous solution using response surface methodology. The Box–Behnken design (BBD) was employed to optimize three parameters (nZVI-Ag dose, reaction temperature, and PS concentration) using 4-chlorophenol (4-CP) as the target pollutant. The synthesis of nZVI-Ag particles was carried out through a ...


    By IWA Publishing

  • Used Furnaces & Ovens

    Industrial ovens and furnaces are both heated chambers used to process raw materials at higher temperatures than what can be obtained in open-air systems. There is a range of heat treatments possible with both industrial furnaces and ovens, and the main purpose of any heat treatment is to change the mechanical of physical properties of a material. Some examples of materials that benefit from heat ...


    By Thermcraft Inc

  • Simplifying the Screening Workflow for Extractables Testing: Infographic

    The safety of pharmaceuticals, cosmetics, and foodstuffs may be compromised by chemical compounds in the various types of packaging and food contact materials (FCMs) that are in direct contact with the consumer product. Due to continuously increasing global regulations, the characterization of extractables and ...


    By Climate Institute

  • Meet the Team - Stefanie Mayer, Test Center Manager, shares her application findings

    Q: How would you describe your role at TOMRA Sorting and what does it involve? My role at TOMRA Sorting is the management of our main Test Center Recycling in Koblenz. This includes the planning of customer tests, testing of new applications and giving technical ...


    By TOMRA Sorting GmbH.

  • How a contract research lab advanced its polymer characterization capabilities

    Realizing the Advantages of Ultra-High-Performance Size Exclusion Chromatography Compared to GPC Intertek is a global provider of quality and safety services designed to help businesses improve products, assets and processes, overcome market constraints and reduce risks. From auditing and inspection, to testing, training, and certification, Intertek enables customers to meet end ...


    By Waters Corporation

  • Turbulence in continuous flow surface aeration systems

    Turbulence characteristics in an optimal continuous surface aeration system were investigated in this study. The experimental system consists of a rectangular tank, where flow is driven by equally spaced aerators placed on the liquid surface. The mass-transfer coefficient and turbulent parameters at the tank's inlet and outlet were measured to enable analysis of their interdependent ...


    By IWA Publishing

  • How HDXRF Helps Volcom Comply with Global Regulations - Case Study

    Volcom, Inc. is a lifestyle brand that designs, markets, and distributes high-quality boardsportsoriented products like clothing, footwear and accessories. As a global company, their restricted chemicals list is a combination and reflection of many international standards. CPSC and Proposition 65 lead the way for many of the chemicals’ lower limit regulations, but Canadian, Chinese, and ...


    By X-Ray Optical Systems (XOS)

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