If you plow long enough, you start to understand that salt is both your partner and your biggest problem. It melts ice like nothing else, but it also works its way into every corner of your plow. It settles on your hydraulic lines, dries on your wiring harness, and cakes into the A-frame. Furthermore, it’ll quietly eat away at your plow until one day you’re dealing with more than a dirty rig; you’re facing costly repairs or premature replacement.
Most of the plows that come into our shop with corrosion issues didn’t fail overnight. The damage usually began in November or December, during the first wet storms, when salt spray gets kicked everywhere. By January, you start seeing the signs: stiff cylinders on cold starts, connectors that only work after you smack them, or a cutting edge that suddenly looks five years older.
Salt builds slowly. But once it gets a foothold, it doesn’t stop.
Why Salt is Your Plow’s Silent Enemy
Salt corrosion isn’t just surface rust. It’s a chemical reaction that accelerates when moisture is present, which, in a Michigan winter, is basically all the time. Road salt (sodium chloride) dissolves into an electrolyte solution when it gets wet. This solution conducts electricity, which fuels a process called electrochemical corrosion. Think of the salty water as battery acid for your plow: it breaks through the metal’s coating and speeds up the rust until the steel dissolves.
The most vulnerable spots aren’t always the obvious ones:
- Weld seams and joints: Where two pieces of metal meet, salt and moisture get trapped, starting corrosion from the inside out.
- Under the mounting system: A dark, wet, salty environment perfect for rust to take hold unseen.
- Hydraulic cylinder rods: Pitted rods destroy seals, leading to leaks and hydraulic failure.
- Cutting edges and moldboards: Direct, constant abrasion wears away protective coatings, letting salt attack bare metal.
If your equipment is already fighting early rust or thinning coatings, upgrading or refreshing your setup can also help. A quick look through durable commercial-grade options like the ones in our snow plows & equipment lineup gives you a sense of what holds up best under heavy salt exposure.
A Practical Defense Plan: The After-Storm Routine
The single most effective thing you can do is break the cycle of salt sitting on your equipment. This isn’t about a deep clean every time, but a consistent, quick routine that makes a big difference over a season.
1. Rinse While It’s (Relatively) Warm.
Don’t wait for the plow to sit overnight. If temperatures are above freezing, hit it with a pressure washer as soon as you’re done for the day. Focus the stream on the underside of the moldboard, the A-frame, and the hydraulic rams. The goal is to blast off the slushy, salty brine before it dries and cakes on.
2. If it’s Too Cold to Wash, Brush it Off.
When it’s below freezing, a pressure washer might just ice everything up. Instead, keep a stiff-bristle brush or even a snow broom in the truck. Knock off the excess salt and snow buildup from critical areas, especially around cylinder rods and pivot points. Getting the bulk off is better than nothing.
3. Pay Attention to the Hidden Spots.
Once a week, or after a particularly heavy salting event, make time for a closer look. Manually wipe down hydraulic rods with a rag. Check for salt packed into crevices around lights and wiring harnesses. A little attention prevents big electrical gremlins later.
4. Let It Dry.
If you have an enclosed space, even an unheated garage, park the plow inside after rinsing. Airflow helps dry remaining moisture. If you must store outside, try to park it out of the wind.
When a customer brings in a plow that’s starting to rust out, our team at WMTS doesn’t just wash it and send it back. We go through the entire corrosion chain:
- We check the cylinder rods for pitting and polish or replace them before they destroy the seals.
- We pull the covers off the wiring, open the connectors, and clean out any hidden corrosion that would cause mid-storm electrical failures.
- We inspect the A-frame and mounting points, looking for rust that starts between seams and grows outward.
- We evaluate the cutting-edge and moldboard coatings, so you’re not plowing with bare metal for half the season.
If a component is too far gone, we help operators choose a replacement that can handle our local salt conditions. The goal isn’t just to make the plow look better for a week. It’s to stop the corrosion cycle completely so you’re not back in the shop every winter with the same fight on your hands.
If you’re already seeing significant rust or want a professional to give your setup a corrosion-fighting treatment before next season, we can help. West Michigan sees what salt does every spring, and we’ve got the tools and know-how to fix it and strengthen your gear for the future.