Materials.Business Weekly ⚙️

October 05, 2021

Quote of the week: “If you can imagine it, we can make it.” John Charles Dykstra, US special effects artist (1947).

From The Editor's Corner

Corrosion resistant light alloys, smart surface cleaning, and more sustainable cars



A new overview of the files of the six most representative patent offices in the world provides us with three new inspiring papers on facing corrosion problems with innovation. Just a reminder that all our community of corrosionists, independent of the level of expertise, or the working place, can look for novel solutions. Many times. These solutions are prone to become protected knowledge and patenting is one interesting way. A pathway for constructing intellectual capital and intangible but valuable assets.

More than anodized aluminum. When significant changes in materials handling are happening, Al alloys appear as an important option in several applications where requirements as light weight, easy processing, good conductivity, and relatively low price are becoming relevant. This is the reason why new anticorrosive options of aluminum alloys are attractive. One option is the expired patent concerning a conversion coating developed for the specific application of aluminum parts for semiconductor equipment. However, today we can think of other applications that use the same or similar protective coating.

Smart surface cleaning and drying. Tesla has been awarded a patent concerning the employment of a laser beam to detect and remove dirt from the windshield. Laser technique has several applications on anticorrosion practice. This is a different and special application of laser beams to the surface cleaning of glass. However, we can remember a kind of innovation called “crossed innovation” or the application of the idea in a different business. This is the case if we think about the possibility of applying a laser beam to control sooting, wetting, and other kinds of surface contamination, and the subsequent risk of corrosion.

Better stainless steels for sustainability. At the end of the day, we have an application on the development of new steels for brake discs for wear reduction. Consequently, the thickness and weight of the disc could be reduced, and cars will be less energy demanding and more eco-friendly.

Remember: Protection of materials and equipment is a profitable business!

Prof. Carlos Arroyave, Ph.D. Editor.

Expired exclusivity

Patent granter: Japan Patent Office – JPO

Patent No.: JP2009128191A

Title: Corrosion resistant aluminum article for semiconductor process

Author (s): Craig A. Bercaw, Laxman Murugesh, Joshua E. Byrne

Applicant (s): Applied Materials Inc.

Priority date: 12. 07.1996

Summary: Therewas developed a highpurity Al-Mg alloy (0.1 to 1.5% Mg) and a maximum of 0.2% of total impurities (Si, FE, Cu, Cr, or Zn) with high corrosion resistance achieved by a conversion barrier obtained by exposure to a magnesium halogen bath. As a result, a protective coating of magnesium halide, with a thickness in the range of 0.0025 microns to 2 microns, is obtained. This is an application useful for semiconductor applications, where integrated circuits are made by successive deposition and etching techniques, including halogen gases or liquids (chlorine, fluorine, bromine), which are very corrosive for conventional aluminum alloys, even the anodized ones.

A new invention granted (in force)

Patent granter: the United States Patent and Trademark Office – USPTO

Patent No.: US 11,110,896 B2

Title: Pulsed laser cleaning of debris accumulated on glass articles in vehicles and photovoltaic assemblies

Inventor (s): Phiroze Dalal

Applicant (s): Tesla, Inc.

Date of patent: 07.09.2021

Summary: Applicants asked for the recognition of the invention of an optic system, including circuitry mounted on the hood of the car (laser windshield wipers), which emit a controlled laser beam able to irradiate a selected area of the windshield, detect present debris by an optical sensor, and remove dirt. The laser beam parameters (wavelength, frequency, spot radius, pulse duration, peak power, angle of incidence, etc.) are controlled to achieve the expected cleanness but avoid any risk of radiation behind the glass or beneath the area of interest. The accepted claims include applications of the invention in other situations as photovoltaic assemblies.

A requested recognition

Patent granter: Korean Intellectual Property Office

Application No.: 10-2020-0177657

Title: Austenite based steel material for disc brake having excellent strength at high temperature and method of manufacturing

Author(s): Soon-ki Lee, Dong-ho Lee, Sang-deok Kang

Applicant (s): POSCO

Priority date: 19.12.2019

Summary: This claimed invention concerns the design and fabrication of new stainless steel exceptionally functional disk brakes. The key fact is a content of 10 to 25% Mn, up to 8% Cr, and 0.2 to 1.8% C. According to the applicants, this steel shows an excellent high-temperature abrasion resistance. Such behavior is due to the film of precipitates 0.1 to 2.0 μm thick, present at the austenite grain boundaries. As a result, thinner and lighter brake discs can be used.

Materials Biz News

3D printing to boost exchanger performance

A team of researchers from the University of Illinois at Urbana-Champaign used 3D printing technology to produce an ultra-compact next-generation heat exchanger, increasing performance by up to 2000%, heat exchangers are simply used to transfer thermal energy from point A to point B. They are essential in most large industries and are present in almost all complex systems that generate heat. This includes power generation systems, transportation, oil and gas processing, water desalination, and thermal management for consumer electronics. Using their 3D design software, the team studied a special type of heat exchanger called a tube-in-tube heat exchanger, which is often found in heat transfer systems, drinking water and building energy systems. With millions of heat exchangers in use around the world today, their performance and efficiency has become more important than ever for global sustainability and reducing energy consumption.

Prevent cathodic corrosion of metal electrodes towards more sustainable processes

Betting for sustainability, a team of researchers from the Johannes Gutenberg University Mainz, Germany, and the Iowa State University, USA, are working together in order to find how to solve the problem of corrosion of the cathode in a promising application concerning with the electrolysis process for synthesizing valuable chemicals from contaminated soil with plastics. In principle, they are oriented to explore cathode coatings by salts, and corrosion inhibition. Tools are quantum chemistry for calculating the chemical reactions happening, and multi-scale modeling for mapping the movement and concentration of the ions in the catholyte.

Recovery of vanadium from steel slag has increased

A hydrometallurgical process to recover vanadium from slag, a byproduct of steelmaking, has been scaled up significantly. In this demonstration project, vanadium recovery rates exceeded 75% at steady state with over 99.5% vanadium pentoxide purity. The process begins with comminution of the slag, followed by multiple leaching steps using alkaline carbonate process water, resulting in a solid residue that is filtered, repulsed and washed to recover any additional soluble vanadium.


Join to a failure analysis and forensic engineering team

Senior Materials & Metallurgical Engineer

Manage the investigation of failures of equipment and systems

Flow Assurance Engineer

Development of corrosion sensors


Networking & Knowledge Exchange​​

Corrosion Modeling Basics. Virtual

OLI systems Inc. is offering a two-day course designed to train attendees on how to use OLI’s software and its underlying chemistry and thermodynamic principles you will learn how to create corrosive environments (either as ionic or molecular stream inputs), specify environmental parameters (pH, O2/ CO2/ H2S concentration, flow dynamics, temperature, etc.)

Dates: Monday, October, 25th andWednesday, October 27th of 2021.

Hours: From 9:00 to 12 EDT (GMT - 4)

East Asia Pacific Area (EAPA) 2021 Conference. Virtual

AMPP (Association for Materials protection and Performance) is offering a two-day conference gathering professionals from around the world representing infrastructure, utilities, transportation, oil & gas production, and manufacturing, this year the conference join efforts with ACA (Australian Corrosion Association). You will be attending topics such as:

● Advancement in corrosion mitigation

● Asset integrity

● Risk management

● Coatings

● Cathodic protection

● Corrosion R&D

● Digital transformation in corrosion

Dates: From Tuesday, October 12th to Wednesday, October 13th of 2021.

Hours: From 9:00 to 14:00 (GMT + 8)

Strategic management of maintenance. Virtual

For Spanish speakers.** Colombian Association of Engineers** is offering a nine-day course to give you the tools and management criteria to develop a maintenance management system based on the strategic management approach with orientation to asset management and improved reliability. This course will be accompanied by workshops to interact between you and the participants and share results of the exercises developed during the training.

Dates: FromMonday, October 25th to Thursday, November 04th of 2021.

Hours: 18:30 to 20:30 (GMT – 5)

Upcoming events

October 2021

October 06th Taking aluminum to new horizons(Link)

October 07th Sensors, controls, and digitalization – Defining the foundation industries’ sector innovation needs (Link)

​October 12th East Asia Pacific Area (EAPA) 2021 Conference (Link)

October 14th Waste utilization and symbiosis – Defining the foundation industries’ sector innovation needs (Link)

October 21st Heat recovery and utilization – Solutions for the foundation industries sector (Link)

​October 25th Strategic management of maintenance (Link)

October 25th Control Valves & Actuated On/Off Valves (Link)

October 25th Corrosion Modeling Basics (Link)

October 26th 240th Meeting of the Electrochemical Society. (Link)

October 26th Anti-Corrosion Paint Inspection Fundamentals. (Link)

October 28th Sensors, controls, and digitalization – Solutions for the foundation industries sector (Link)

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