Blogs

Presentation #1: Engineering Diagrams for Materials Selection in Water-Based Environments
Water can seem a simple medium to consider from a material selection point of view, but any materials engineer knows that there are many factors that can affect the corrosivity. The influence of pH, temperature, chlorides, oxidizing contaminants, and different alloys and surfaces means that the result can be rather challenging to predict. Today there is a vast body of literature and material selection tools available, but many are outdated, too conservative or otherwise difficult to fully utilize. Furthermore, several modern alloys are often missing. This work covers the development of new engineering diagrams for stainless steels in chloride containing water, based on recent test data, and covering several steel grades, both classic and modern. The ambition has been to facilitate material selection in water-based systems to increase cost efficiency and operational reliability. New data will be presented and the thought process behind the development of the diagrams will be explained.

Presentation #2: Corrosion Performance of the Austenitic Grade UNS N08935 in Harsh Chemical Environments
For the highly corrosive environments that may be found in chemical process industries, it can be a challenge to select the most appropriate material when it comes to both cost efficiency and reliability. Oftentimes advanced Ni-based alloys are required to battle the harsh conditions. UNS N08935 is a highly alloyed austenitic material with a high resistance to corrosion. With a nickel content of 35% it is a relatively lean alternative to conventional nickel-based alloys, while in many cases offering similar corrosion resistance. This work focuses on the performance of N08935 in acidic and chloride containing environments and looks to identify environments and applications where this grade can offer an advantage over established materials, focusing especially on its resistance to uniform corrosion. Different product forms will also be discussed, with explosion bonding to achieve thicker gauges provided as an example.