Diffusion Coatings


In diffusion coating the surface of a component is enriched with an element or combination of elements that can impart a high degree of resistance to specific wastage mechanisms. These coatings can be highly effective at resisting the effects of elevated temperature corrosion as well as abrasive-type wear. Elements such as chromium, aluminum, silicon and combinations thereof modify the stability of the protective oxide film of the base metal to provide high levels of resistance to the most aggressive elevated temperature corrosion mechanisms, while chromium and boron can combine with other elements in the base metal to produce a very hard surface layer that will resist the effects of abrasive wear. ATC has been awarded a number of patents related to the diffusion of chromium into industrial-type components.


Diffusion Coatings



Two smelt spouts that have been chromized using ATC's process.  This process will increase life of the spouts against a highly corrosive environment.



This piece to a turbine has boron diffused into the blades to increase its resistance to an erosive life.

QC performed on end product


QC samples will show diffusion depth and ensure the end product will have adequate resistance to the type of wear the product will be exposed to.  

Thermal Spray


Extendalloy - Nickel Based Tungsten Carbide and Nickel Based Chromium Carbide Alloys applied by thermal spray. Thermal spray is a process whereby harder, more corrosion resistant, or tougher materal is applied as a coating to a base metal. The coating is brazed at high temperature to the base material. Powder metal alloys are used in (PTA) and thermal spray processes like HVOF, plasma spray, Spray-and-Fuse, etc. We can spray any commonly specified engineering material. ATC can provide traditional powder spray, spray-and-fuse, HVOF, plasma spray, and twin-arc. ATC provides thermal spray services to the Electric Power Industry, the Waste-to-Energy Industry.


Thermal Spray

Spray and Fuse


Powder spray being applied to the panel before fuse.

Spray and Fuse


Panel extracted from the furnace and the powder has now fused with the base material.

Spray and Fuse


Finished product 

Heat Treatment


ATC began its operation as a combined coatings and heat treating company and its technical specialists have accumulated more than 175 years of experience in these fields. In heat treating, ATC has an array of high temperature furnaces dedicated to the heat treatment of a wide rage of materials, such as most ferrous alloys, including austenitic, ferritic and martensitic stainless steels; many non-ferrous alloys, including aluminum and nickel-based alloys; and tool steels. ATC specializes in the heat treatment of those advanced pressure part alloys, like Grade 91, where precise control of temperature is critical to the performance of the material. Specific heat treatment protocols offered include: Quench and tempering, normalizing, annealing, solution annealing, stabilization annealing, tempering, stress-relieving, Post-Weld Heat Treatment and precipitation hardening. Our heat treating capabilities include: gas fired and electric furnaces, including a hydrogen atmosphere furnace. Heating zone sizes range from one cubic foot to 10 foot wide x 12 foot high x 35 foot long. ATC has received the necessary permits to clean polymer-infused components. ATC is developing the capability to due flame hardening and will be operational by the third quarter of 2017. Supporting the heat treatment operation are six overhead cranes with capacities ranging from 5 tons to 15 tons.


Heat Treatment


Product being extracted from the furnace


Product being transferred from furnace bed to hooks in order to lower into the quench tank.


Product about to be lowered into the quench tank.

Large Component Heat Treatment


Large Component Heat Treatment


Large Furnace Capacity