5 Main reasons for car battery corrosion with solutions

It is practically impossible for a vehicle to operate if we remove the battery. It is what allows us to start the car’s engine and start our journey. Sometimes we find it with a large number of formations around. Ignoring this can be extremely damaging to your car.

What causes corrosion on battery terminals?

Most car batteries run on sulfuric acid, which generates an electrical reaction when it comes in contact with battery fluid. This provides the energy needed to start the car and start the engine. Once the car’s engine is started, the battery is responsible for operating many of the accessories such as air conditioning and heating.

Battery terminal corrosion

That acid can cause chemical reactions with lead in cells and other elements. Over time it starts to come out of the car battery and corrosion begins to form. It happens first at the car’s terminals, and then it spreads everywhere, creating corrosion under the car’s hood.

Car battery corrosion caused by the reaction of the sulfuric acid in the battery is highly toxic. And not only for your car: if it reaches the air conditioning filters, it can harm you and your family. It is also an oxidation accelerator and facilitates corrosion in all parts with which it comes into contact.

How to avoid battery corrosion?

Car battery maintenance should be on our to-do list as preventive care for our car, as well as checking the oil level or even the tire pressures. Check that the level of the battery liquid is adequate when the batteries are not sealed, otherwise, you run the risk of the sulfuric acid starting to lighten, come out, and form that white powder that we nickname as tartar.

What causes corrosion on the positive battery terminal?

If there is already a bit of scale, the first thing to do is clean the battery terminals, to prevent it from spreading and continuing to damage other elements. To do this, spray baking soda over the entire tartar stain and then squeeze a lemon and let it bubble. With a soft brush, carve all the affected surfaces. Then clean with disposable paper napkins. Don’t forget to wear gloves.

To prevent this situation from recurring there are two fundamental tasks:

  1. Fill with battery fluid whenever necessary.
  2. Spray with a little bit of multipurpose lubricant to prevent corrosion from sticking to surfaces and starting to spread.

Defects in automobile batteries can occur without notice. And when this happens, it is common to think that it is a problem of the whole vehicle because it does not start. However, this is not so. What’s more, your vehicle may be fine. The problem is that the battery is not working.

Batteries are perhaps the most volatile component in a vehicle, and they don’t take long to malfunction. Their lifespan is a few years, and they stop working quickly due to disuse, corrosion, and connection failures.

A large amount of energy is required to start an engine and start a vehicle. Batteries are designed to provide a strong shock of power and voltage for a short period of time.

If you are not sure what the problem is, be sure to read the three possible problems that Enerjet batteries have collected and will present below.

Bad connections

The battery has two ports, one positive and one negative. It also has cables that are attached to each of these ports that go from the battery to the starter.

Sometimes the screws or bolts that connect the ports to the cables come loose. This causes the connection to break and the vehicle to not start at all. This is the result of the absence of energy that passes from the battery to the starter.

So if you are trying to start your vehicle and cannot, it is advisable to check the connections. This problem may also be an indicator of solenoid problems.

Corroded car battery

Corrosion is another reason why a bad connection occurs. The same two ports we mentioned above can lead to a bad connection and also a corroded connection.

As corrosion develops at the ports, the connection becomes weaker. There is less metal-to-metal contact and therefore it is more difficult for power to flow from the battery to the starter.

If your battery has problems, it is advisable to check the ports for corrosion. If so, they need cleaning.


If you let your vehicle idle for a while, at least two weeks or more, then your battery could have lost enough power and the engine stops starting as a result.

After the battery starts a vehicle, the alternator takes over and powers the car’s electrical systems and also recharges the battery. As long as the vehicle is in constant operation, the battery can be continuously recharged and is ready for use.

However, if your vehicle is generally idle, the battery will gradually lose power over time and soon will not have enough to send the necessary voltage to the starter.

Alternator problems

Battery problems can quickly result from alternator problems. If your alternator is not OK then it will not be able to charge your battery. They will start the vehicle, you will drive for a moment and then it will turn off.

Then the battery won’t turn on and you’ll be stranded. As we mentioned in the previous point, the alternator powers almost all of the author’s electrical systems once it is turned on. It also recharges the battery.

So if your alternator doesn’t work well, not only will your battery not fully charged, but your vehicle could stop while driving because it’s not generating enough spark, among other things, for your vehicle to run successfully.


Vehicle batteries are something you don’t want to skimp on. They are like tires. You can buy poor quality tires and use them for a while. But you will be back in the temptation before the expected to get others because the ones you bought have already worn out. So if you are one of the people who really want to avoid any inconvenience, you need to make sure you get a good quality battery and keep the ports corrosion-free and well connected.

About the Author: luis

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