Supplier Spotlight

Video Exclusives

Continental Active Purge Pump

gtr

Continental details its APP technology as a new solution to meet stricter hydrocarbon evaporation legislation around the globe


Ferrari 812 Superfast powertrain

gtr

Ferrari details its IEOTYA 'Above 4-liter' category winning engine, as fitted to its latest model, the 812 Superfast


Click here/on image to watch video

Do you feel that the increasing political pressure on the IC engine is justified?

News

New process evaluates corrosion resistance of cylinders

Federal-Mogul Powertrain has developed a new process for ranking the corrosion resistance of cylinder liner materials that will enable it to supply even more durable components for the most challenging applications. By enabling direct comparison of different materials and coating processes, the new test methodology allows material development to be specifically targeted at circumstances involving poor-quality fuel and high levels of EGR.

"Higher rates of EGR and the use of high-sulphur diesel fuels present significant challenges for the wear of ferrous cylinder bore surfaces," commented Gian Maria Olivetti, chief technology officer, Federal-Mogul Powertrain. "Advanced thermally sprayed liners solutions, like our Sprayfit thin-walled liner, could combine effective heat dissipation with the benefit of a wide range of wear resistant surfaces. However, it remains necessary to evaluate the performance of alternative material choices in a reliable way and we now have a proven process to achieve this."

Prior to the work by Federal-Mogul Powertrain, there was no recognised procedure for comparing the likely corrosion resistance during engine operation of different materials. The complex relationship between mechanical wear and corrosion means that each must be evaluated independently in order to identify the most resistant materials.

Mechanical wear removes corrosion products to expose an unprotected surface, promoting further corrosion. The corroded surface has inferior wear resistance, which further accelerates wear in a continuous cycle.

Federal-Mogul Powertrain has accurately reproduced the corrosive solutions of combustion products formed inside an engine, including sulphuric, nitric and acetic acids, and used them to carry out a range of tests. These include immersion tests, using a boiling solution of the appropriate composition, and electrochemical investigation at temperatures close to the solution’s flash point, supported by metallographic inspection. The test solution can be controlled to reproduce the properties of a typical sulphur condensate or EGR condensate.

Test results showed the most aggressive corrosion rates occurred through exposure to a sulphur condensate, and its effect on various materials was compared using a conventionally manufactured grade of cast iron as a reference. Corrosion resistance was found to be improved with higher chromium content, but deteriorated as the oxide content (iron oxides, chromium oxides) of the material increased.

"Our test process allows us to identify both bulk materials and surface coatings with the necessary resistance to corrosion and wear for even the most severe liner applications," said Dr.-Ing. Volker Scherer, Director, Liners, Federal-Mogul Powertrain. "By working closely with our customers, we can from the outset engineer the material properties to withstand the specific challenges of their individual application."

12 April 2017


Read Latest Issue

International Engine of the Year Awards
Read Latest Issue

Web Exclusive Articles

Engines on test: Honda K20C1 2.0-liter turbocharged I4
Type-R once stood for raw, naturally aspirated performance, but as legislation tightens its relentless grip around that offshoot of engine design, how well does its spirit translate in to the latest generation of hot hatchbacks from the Japanese OEM?
Read Now

Engines on test: BMW TwinPower 3.0-liter diesel
Whilst the entire world looks happy to turn its back on diesel, BMW is persisting with the fuel source with its range of magnificent TwinPower engines, proving that mpg and performance aren't mutally exclusive. We see just how good the 3.0-liter engine is, in the all-new 530D X-Drive
Read Now

Singer Williams lightweight air-cooled flat-six: The Knowledge
Singer Vehicle Design has released details of its performance research study with Williams Advanced Engineering, which looked at creating a ligher, more powerful air-cooled flat-six
Read Now

Read Latest Issue

Supplier Spotlight

Supplier SpotlightClick here for listings and information on leading suppliers covering all aspects of the engine technology industry. Want to see your company included? Contact aboobaker.tayub@ukimediaevents.com for more details.

فروشگاه اینترنتی فروشگاه اینترنتی سیستم همکاری در فروش کانال تلگرام چت روم ماهواره آنلاین اندروید دانلود فیلم فروشگظ;ه اینترنتی

Submit your industry opinion

Industry BlogDo you have an opinion you'd like to share with the engine technology community? We'd like to hear your views and opinions on the leading issues shaping the industry. Share your comments by sending up to 500 words to d.slavnich@ukimediaevents.com

Submit Your Recruitment Ad

Recruitment AdTo send us your recruitment advertising or to receive information on placing a banner please email aboobaker.tayub@ukimediaevents.com