Knife Line Attack Posted on 4th December 201518th May 2021 by ThePD (The Project Definition) Knife Line Attack is the intergranular corrosion of an alloy involving a stabilized stainless steel or an alloy. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged corrosion. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.