Are aluminum containers more corrosion resistant than steel containers? Aluminum is a more chemically reactive metal than iron and thus should be less corrosion-resistant than steel.
However, the actual answer to the above question on which metal is more corrosion resistant is: it depends on your formula chemistry. Steel typically corrodes very rapidly when the solution formula pH is below approximately five.
Conversely, steel corrosion could be significantly slower when the solution formula pH is approximately above Generally, aluminum corrosion rates are the lowest when the solution pH is somewhere between four and seven. However, aluminum also corrodes rapidly when the solution pH is below approximately four, and aluminum dissolves in very high pH solutions e.
Two examples will help illustrate the compatibility of aluminum and tinplated steel containers with different types of formulas. A hair mousse formula with a pH of four is usually compatible with aluminum containers, but is usually not compatible with steel containers in the early s most of us unsuccessfully attempted to find a coated steel aerosol container for hair mousse formulas.
An aluminum container is usually not compatible with a high pH oven cleaner, while steel containers are typically used for aerosol oven cleaners.
There are a few rules-of-thumb about formula pH as a guide for when to use aluminum or steel containers. These are:. However, other formula ingredients could invalidate these pH rules-of-thumb.
For example, organic halogens most notably carbon tetrachloride could violently react with aluminum. Related Items.
Need more information? Call a Product Specialist Monday through Friday, 8 a. Toll-Free: Fax: Email a Product Specialist productspecialist theruststore. All Rights Reserved. Ideally, keep the aluminum dry. Many boaters also use a sacrificial anode made of zinc. This corrodes faster than the aluminum, in effect, sacrificing itself. Sacrificial anodes do need replacing periodically, but then so will most coatings.
In the movie Tony Stark says he moved on from the original iron suit to one made of a gold-titanium alloy. They suggest a better option would be Nitinol, an alloy of nickel and titanium. You can request Nitinol for your next fabrication project if you want, but it may work out to be a little expensive.
Maybe he should find a plating service that can help him protect his metal components. Rust vs Corrosion Most metals want to corrode back to some form of ore. Aluminum Corrosion Scratching this oxide skin exposes bare metal, and the process begins again. Minimize or mitigate the effect of galvanic corrosion. Preventing Galvanic Corrosion Ideally, keep the aluminum dry. Building a Better Iron Man Suit In the movie Tony Stark says he moved on from the original iron suit to one made of a gold-titanium alloy.
0コメント