CGTX 71506 is the first addition to my (hopeful) fleet of tank cars for sulphuric acid service. Sulphuric acid is a common industrial chemical and a by-product of ore smelting operations. I’ve posted prototype photos in previous “Freight Car Friday” themed posts of acid cars running over the former ACR, likely from the operations at Timmins, ON or Rouyn-Noranda, QC via the Ontario Northland Railway through Hearst.
This model is a Tangent Scale Models car which was purchased as an undecorated/lettered but assembled and painted (black) model. The model represents a General American Transportation 8000 gallon car for acid service built in the late 1940s, but is very similar (identical in size and overall profile with only minor detail differences that you’d only notice if doing a direct side by side comparison of the model and prototype photo) to several older CGTX cars as well, so I was able to use it as a nice stand in. I’m unsure of the exact original build date of the CGTX cars but they would be from the same period – late 1940s-early 1950s and with railroad cars having about a 40-year lifespan, it’s plausible to be running out its last miles in the mid 1980s.
I didn’t actually change any details but just lettered the car following a late 1970s prototype photo with an old Herald King CGTX tank car decal set, with some additional detail lettering and COTS, ACI and U-1 decals to bring it up to a 1980s appearance from various Microscale sheets. With a little bit of in-service weathering, this car’s appearance will be completed and it will be ready to haul loads of acid from the smelters to industrial users in the central/mid-west USA.
CGTX 70638 tank car placarded sulphuric acid at Sault Ste. Marie July 12, 2013
Another common industrial acid is sulphuric acid – indeed it is probably one of the most common industrial chemicals shipped by rail. Uses of sulphuric acid are almost endless, but include chemical digestion of wood fibers for paper making and the production processes of fertilizers and numerous other chemicals including hydrochloric acid (as seen in last week’s Freight Car Friday).
Sulphuric acid is often produced in massive quantities as a byproduct of the smelting and refining of metal ores. Based on the (lack of) compression in the truck springs this and the neighbouring white PVCX acid tank car are heading north empty, for interchange to the Ontario Northland for furtherance to the copper/zinc smelter at Noranda, QC.
Same car two days later at Hawk Junction July 14, 2013, continuing its progress northward.
RCRX 1074 tank car for hydrochloric acid service near Watford, ON February 20, 2011
Hydrochloric acid is a commonly produced industrial chemical that has applications in many chemical and industrial processes including steel making. In steel mills it is used to remove rust, scale and other surface impurities from finished steel.
While the car above was not photographed on the Algoma Central, it is representative of a common type of car in hydrochloric acid service. (Note that the Athearn 20,900 gal. RTC acid tank car is pretty much bang on for this prototype.) I did see a couple of similar SHPX cars at Hawk Junction, but didn’t get a good photo; I could also see some similar tank cars from a distance in Steelton yard from the Canyon Tour Train.
A related byproduct of using hydrochloric acid in the steelmaking process is the production of ferrous chloride as a waste product. This corrosive chemical has uses in water treatment systems, and a CN conductor friend of mine recently mentioned that he occasionally delivers a tank car of ferrous chloride from Sault Ste. Marie to the water treatment plant in downtown Toronto. Ferrous chloride (and related compounds like ferric chloride) is also shipped in tank cars of a similar size and design to hydrochloric acid.
ACFX 72346 tank car placarded for ferrous chloride at Sarnia, ON October 10, 2011