Auto Detailing Chemicals and Car Wash Products

Auto Detailing Chemicals and Car Wash Products

Auto Detailing Chemicals and Car Wash Products

In the science of car painting and detailing, dirt can be classified as organic soil, non-organic soil and petroleum soil. Not much else exists in the car world. If you can figure out the type of soil, you can select the proper cleaner. With the proper cleaner, 99% of all stains will come out.

Organic soil is anything that contains carbons. This includes all proteins, animal fats, body oils, mold, yeast, bugs, bacteria, animal and bug excrement, and carbohydrates. Those chili-cheese fries you spilled on the front seat are a classic organic soil.

Non-organic soil is soil that does not contain carbons. This is most commonly found on the exterior of a car in the form of water spots and acid rain spots.  Scale and lime deposits are the most common form of non-organic soil.

Petroleum soils are substances that do not contain water and will not mix with water. Petroleum soils do not have a pH factor. Petroleum soils include common chemicals like motor oil, grease and road tar.  By the way, chewing gum also falls into this category.

It is also possible to have a combination of the three soils. This is a nightmare, as combination soils are difficult to identify. How do you choose a cleaner for something you can't identify?  It's very difficult unless you have a general-purpose cleaner that works well on all soils.

Car Detailing Cleaning Chemicals

The car painting and detailing industry is full of chemicals for cleaning. There is no such thing as a do-it-all cleaner or complete car wash products (no matter what you saw on some crazy infomercial!). It simply does not exist. Detailing chemicals are mixtures of different ingredients formulated to do a particular job. The most common types of chemicals include surfactants, solvents, wetting agents, saponifiers and chelators.

The word surfactant is another word for a soap or detergent. Surfactant molecules are created with two compounds. One molecule is attracted to the soil itself, and the other is attracted to water. The chemical compound that's attracted to water is called a hydrophile. Its job is to surround the soil. Likewise, the chemical compound that's attracted to soil is called a hydrophobe. Its job is to break soil into smaller pieces that the hydrophile can surround and float away.

Every cleaner needs a solvent to dissolve soil. The most common solvent is one you might not even think of: water. Some solvents, such as mineral spirits, work great on petroleum soils (like tar and grease) and may be necessary on surfaces that might be damaged by water. Other solvents that are common in car care chemicals include d-limonene (made from orange and lemon peels) and butyl. Although a bit more expensive than other cleaners, d-limonene is a safe solvent to use throughout the car.

Chemists modify the hydrophile and hydrophobe molecules to change the characteristics of a surfactant.  For example, a surfactant that is a good detergent (detergents break a soil's bond to a surface) will not be a good penetrating agent. Penetrating and wetting allows water to surround soil so it can be removed. As you might have now surmised, the chemist can improve the performance of a good detergent surfactant by including a second surfactant that has good wetting and penetrating qualities.

Did you know that animal fat is used in the manufacturing of soaps? Boil some pig fat, add a handful of lye, and you can make a bar of soap. The same chemical process that makes soap can be used to remove fats and oils. Chemists use an agent called a saponifier (basically a strong alkaline substance) to convert fats and oils into soap. Once transformed to soap, fats and oils can be washed away with water.

Speaking of soap, have you ever noticed how much better soap does in soft water? If you're used to hard water conditions, using a bar of soap in soft water feels much different. Hard water, which is any water that contains high concentrations of calcium, iron, magnesium and other minerals, thwarts the cleaning ability of a chemical. This is because the cleaner reacts to the minerals in hard water as soil, which uses up the cleaning agents.

To combat this problem, chemists add chelating agents to their cleaners to bind the minerals so the cleaner can go after the real soil. This is why some car wash shampoos seem to hold the suds longer than others. You can't distinguish good car wash products by the suds - good suds have very little to do with how much car shampoo you use.Lubrication is the most important factor of a shampoo. It allows mitts and sponges to glide across the surface rather than drag dirt across causing marring or scratches.

Understanding pH in Car Detailing

The term pH is a measurement of the relationship between hydrogen ions and hydroxyl ions.  When you have more hydrogen ions than hydroxyl ions, you have an acid.  Likewise, if you have more hydroxyl ions than hydrogen ions you have an alkali.

Any solution with a water base has a pH measurement. The pH scale runs from 0 to 14.  The first half of the scale (0.0 to 6.9) represents acids, and the second half (7.1 to 14.0) represents alkalis.  Pure water is neutral and has a pH of 7.0.  If a substance does not contain water (mineral spirits is an example), it does not have a pH.

If you know the pH of a cleaner you will know if it is acidic or alkaline.  This will help you know where to use the cleaner. For example, a carpet shampoo would have a pH around 8 or 9, whereas a wheel cleaner would be between 12 and 14.  Use the wheel cleaner on your carpet, and you'll have a real mess. 

Now that you know the chemical basics, you can use the information for car painting and detailing. Here are some tips to remember when selecting car wash products that will work for your needs:

  1. Organic soil is cleaned with alkaline cleaners.
  2. Non-organic soil is removed with acids.
  3. Petroleum soil must be removed with a petroleum-based cleaner.
  4. Never use a cleaner that is too strong for the soil you're trying to remove.
  5. When in doubt, test a new chemical on a hidden part of the surface you want to clean to verify compatibility.

Car Detailing Chemistry Summary

This chapter has given you a very small glimpse of the hundreds of auto detailing products in the car care industry has to offer.  Good detailing requires a little knowledge of chemistry.  I hope I have provided you with enough information to understand the basics of car painting and detailing.

Please beware of gimmicks and "snake oil".  Unfortunately, mixed in with many great products are an equal number of bad products with fancy marketing.  Hype abounds in the detailing chemicals and supply industry.  If it sounds too good to be true, it is.  Don't be a victim of the car salesman trying to sell you a lifetime sealant and interior protection for $300 to $600.  Do it yourself with good products and save.

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