Updated on 16 October, 2021
One of the first things you think of when you hear the term "Dive Knife" is the knife that a diver uses to take water samples. This is a common equipment in scuba diving schools everywhere. A diver's primary tool is a sharp little knife that has a blade that does not bend but still is capable of cutting through the tough coral polyps and other marine life. Because a diver's equipment needs to hold together with the strength of its metal and its weight, and because the knife can take a lot of abuse from diving trips, it is important that the knife be made out of the best material possible. The materials that are used for the construction of a quality dive knife are discussed below.
The material that is most commonly used for the blades of scuba diving knives is stainless steel. Stainless steel knives have the benefit of being extremely tough and durable, which makes them ideal for harsh underwater conditions. The overall performance and longevity of a scuba diving knife will all depend on what material is used to create the blade.
The two most common materials that are used to create a recurving or serrated edge on a diving knife are either titanium or carbon steel. Most titanium dive knives will have a straight edge that is parallel to the blade and slightly above the surface of the water. Some models of scuba diving knives may also feature a serrated edge, which will allow the user to cut small holes and passages in coral or other forms of the hard surface underwater. Some users prefer a combination of both the straight and serrated edge on their knife, while others only want to have the serrated edge.
Carbon steel is the backbone of most modern dive knives because it is the strongest and lightest material that can be used for the blades. The main advantage of carbon steel blades is that they are extremely tough and can last longer than titanium, stainless steel, or even gold. However, there are several disadvantages to using a carbon steel blade. The biggest disadvantage is that the edges of these knives can easily dull over time. If a person continuously uses a carbon steel dive knife with minimal sharpening, the edges will become blunt and may eventually need to be replaced. Another disadvantage of carbon steel blades is that they tend to corrode easily.
One of the best metals that can be used for the blades of scuba diving knives is nickel-titanium. This metal does not rust nor do they become dull like other metals. The primary drawback to nickel-titanium is the high cost of production. Since this metal must be processed in a special facility, the cost is significantly higher than any other materials. Because of the high production costs of this metal, many manufacturers of dive knives that use this material for the blades are unable to provide them at competitive prices.
Another problem with using a metal that corrodes easily is entanglement. Entanglement is a metal component that becomes trapped between the diver's clothing and the diver's dive knife blade. Because the entanglement can often cause great discomfort to divers, manufacturers of these dive knives have designed additional features that will prevent entanglements. These designs include grooves and slots on the knife's blades. Some also include a specially designed pocket that allows for easy access to the diver's pockets while they are in the water.
A third consideration for the makers of dive knives is whether the material being used is strong enough to prevent it from being damaged by sharpening tools. One option that manufacturers of such products have tried is to create pressurized streams of compressed air. This technique has proven to be successful in preventing corrosion of the steel blades. It also makes it easier to sharpen the edges by removing the sharpening scratches on them.
Scuba divers frequently use a scuba diving knife. Unfortunately, despite their benefits, these tools can present some danger if used incorrectly. For example, because the tip of a scuba diving knife is so small, a lot of the damage that can occur if the knife is used improperly is located very close to the handle. If a sharp edge is used on the handle, it may deflect off and strike the side of the diver's mouth, causing serious injury. A less than adequate sharpness could also result in a blunt point that will tear away from the skin.