Is Power Steering Fluid Corrosive?

Have you ever wondered if power steering fluid is corrosive? Perhaps you’ve been working on your car and worried about exposing yourself to it. While it’s true that some fluids in a car can be hazardous to your health, power steering fluid isn’t one of them.

In this article, we’ll take an in-depth look at what power steering fluid is, how it works, and discuss the potential safety concerns associated with it. By the end, you will have a better understanding of the composition of this critical automotive fluid.

What is a power steering fluid?

A power steering fluid is a liquid that circulates through the power steering system, keeping it cool and lubricated. This type of fluid is used in both hydraulic and electric power steering systems.

Is power steering fluid corrosive?

Yes. Power steering fluid is corrosive and can cause damage to surfaces it comes in contact with.

Power steering fluid is a mixture of various different substances, and depending on how the fluid was manufactured, it could contain any number of corrosive materials.

The most common of these are sulfuric acid, methanol, and water. For example, when using a detergent-based power steering fluid, you could find that the detergent contains alkaline material, which is corrosive.

In general, corrosion occurs when there is an interaction between two or more substances where one substance has a higher electrical potential than the other.

So whether or not something will corrode will depend on what other substances it’s interacting with and whether there’s an electrical current present.

Power steering fluid is a car maintenance necessity because your vehicle’s power steering system uses it to keep the vehicle’s wheels turning properly.

I’m sure you’ve seen the power steering fluid leak out of your car before; if you haven’t, you should see it as soon as possible because this leakage may be dangerous for your vehicle. If a power steering fluid leak goes unnoticed, it might lead to engine damage.

If the power steering fluid is leaking, then you must take immediate action to find out what’s causing the leak and fix the problem. Power steering fluid is a combination of water and glycol, which makes it toxic in its own right.

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You should keep yourself away from any places where there are leaks since these fluids can cause burns, as well as skin and eye irritation if they come into contact with humans or animals.

Power steering fluid is not only toxic but also corrosive. This means that when it drips onto metal parts of your vehicle, it can cause severe damage over time – even if those parts don’t appear rusty at first glance.

Power steering fluid leaks are especially dangerous because they could lead to parts rusting out entirely which can

What are the risks of power steering fluid?

The risks of power steering fluid depend on the type of power steering fluid. The two common types are mineral oil and synthetic. The risks of power steering fluid are linked to the ingredients in the products, particularly the solvents used to clean parts.

Is Power Steering Fluid Corrosive
Is Power Steering Fluid Corrosive

Mineral oil contains solvents that cause skin irritation and severe eye damage, along with respiratory tract irritation. Some brands of mineral oil also contain petroleum distillates, which can harm the liver, kidneys, and central nervous system if ingested or inhaled.

Synthetic power steering fluids pose similar risks but don to a lesser degree. Most synthetic formulations do not contain solvents with high hazardous chemical levels. But because synthetic fluids are often used in engine treatments, they may contain petroleum distillates at low levels.

Power steering fluid can also enter the environment if leaks in hoses or seals go unnoticed or untreated, so it is important to monitor your vehicle regularly for signs of leakage.

Why is power steering fluid corrosive?

Power steering fluid is corrosive because it’s an acidic compound. The acidity of a substance is measured on the pH scale, which runs from 0 to 14—the higher the number, the less acidic the compound.

Power steering fluid typically has a pH level between 2 and 4, which is quite acidic. By comparison, water has a pH level of 7, and blood sits at about 7.4 on the pH scale.

The most common ingredient in power steering fluid is methanol (also called methyl alcohol), which makes up about 60% of the mixture. Methanol is a colorless liquid with a distinctive odor that’s commonly used as a solvent or antifreeze. It’s toxic to ingest and can cause blindness if consumed in large enough amounts.

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As far as why this substance would be corrosive: Corrosion happens when the metal comes into contact with an environment that contains oxygen, like air or water. When this happens, a reaction occurs on the surface of the metal to protect it from further corrosion.

This results in rusting or tarnishing on the surface of the metal, which can break down the structure of various metals over time if left untreated or exposed to high levels of humidity, heat, etc.

What happens if your power steering fluid is corrosive?

If your power steering fluid is corrosive, it means that it’s not going to do its job properly. Corrosive power steering fluid can damage the seals and hoses in your car’s power steering system, which will end up costing you big bucks at the mechanic’s office.

So what should you do about it? First, take a look at the color of your power steering fluid. If it has a lot of black or brown in it, you’re probably going to want to get the old stuff replaced with new ones.

It’s also a good idea to use a dipstick to make sure your power steering fluid is full enough—a low level of power steering fluid can mean that some of the parts in your car’s system are too hot and break down faster than they should.

If you don’t feel comfortable checking these things yourself, no worries! Any mechanic should be able to help you out. There are plenty of ways for them to test whether or not your fluid is still good.

What are the signs of power steering fluid corrosion?

Power steering fluid corrosion is a common problem and can be caused by several factors. It’s very important to know what the signs of power steering fluid corrosion are so you can catch the problem before it gets worse!

  • If your car starts to make a grinding noise when you turn, it could mean your power steering fluid is corroded.
  • Another sign of power steering fluid corrosion is if your car pulls to one side when you drive.
  • If your car starts to vibrate as you drive, this could also be a sign of power steering fluid corrosion.
  • There is rust around the cap of the power steering fluid reservoir.

How long does the power steering fluid corrode?

The short answer is: it depends.

Corrosion is a complex process, and different power steering fluids corrode at different rates, depending on the other chemicals in the fluid (such as anti-foaming agents), what kind of metal parts are involved, and the temperature of the environment.

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That being said, a study by [reference] found that power steering fluid that contains traditional phosphates does not begin to corrode until after 200 hours of exposure.

This same study indicated that corrosion rates vary greatly for different metals, with zinc-coated steel being particularly susceptible to corrosion. Generally speaking, though, there is a wide range of variances in how long power steering fluids will take to corrode.

How to prevent power steering fluid from corroding?

We know you’re a car owner who cares about the condition of your vehicle. If you’re reading this, chances are you’re looking for information about how to prevent power steering fluid from corroding.

Power steering fluid is a crucial component of your vehicle’s operation. Corrosion in this area can lead to costly repairs and even accidents if not addressed. That’s why we’ve created this guide to help you prevent corrosion in your power steering system for years to come.

Step 1: Flush out old power steering fluid

If there is corrosion in your power steering system, flushing it out is an important step toward preventing further damage. You’ll need a drain pan and some new fluid to do this job properly!

Step 2: Pour in new fluid

Once all the old fluid has been removed from the system, pour in some fresh stuff. We recommend using AutoZone’s high-quality power steering fluid—it’s designed specifically for use with vehicles like yours and comes with a manufacturer’s warranty that guarantees its purity and performance. Your car will thank you later!

Step 3: Check the level of your power steering fluid regularly

After replacing old or corroded power steering fluid, it’s important to check on it regularly so that you can prevent future.


As you’ve probably figured out by now, yes, the power steering fluid is corrosive. It can eat through seals on your power steering pump and cause leaks that damage other parts of your vehicle.

This doesn’t mean that you should never use power steering fluid—it just means that you need to exercise some caution.

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