Seal cracks, pitting corrosion, on water tanks with metal or plastic glue
We extend the utilization time of water tanks leaking water or waste water due to corrosion, pitting and cracks by sealing them with epoxy rust converter and metal glue. Water tanks sooner or later start leaking causing argent response. These water tanks are very popular in variety of industries ranging from construction, agriculture, hospitality, to manufacturing. Many of them do not necessary contain water. In an argent situation, the tank's owner faces a crucial decision either to repair the water tank or replace the tank. Both decisions are not easy to make and could have severe financial consequences.
Do cracks, pitting or other forms of corrosion can be repaired on metal water tank?
This is a very complex question and the simple answer is it depends on:
- water tank’ material,
- wall thickness,
- ability to drain the water,
- access to the leak,
- type of cracks,
- size of pitting holes,
- size of corrosion area,
- weather temperature and many others.
Therefore, the answer is not as simple.
Metal water tanks
Most of metal water tanks are made from steel, stainless steel or aluminum. Although all these water tanks should hold the water, many of them hold caustic water. And all are susceptible to corrosion including stainless steel tanks. In all type of metal whether it’s a steel, a stainless steel and an aluminum, thickness of the material plays a major role in water tank repair. Thicker material water tanks are easier to weld repair if they start leaking. But if the water tanks walls are thin or the corrosion area is large, pitting severe, and a large patch is impossible then the rust converter and metal glue is the only option.
Welding repairs of metal water tanks
If one considers welding as a method to repair leaks caused by pitting on a water tank, than the water must be drained from the tank. In many situations this is simply impossible due to variety of reasons. Next, a comfortable access to the welding spot must be granted. And the material of the tank must be thick enough to make the welding feasible. If a wall of water tank is not thick enough for stick welding than other welding techniques can be used. But they do require a different welding machines and a very skilled welder.
If we consider cracks on water tank, then welding is usually preferred as a repair method unless the walls are so thin and there is no comfortable access to the spot. Many stainless-steel water tanks are made from the very thin sheet metal. And they crack on edges due to structural failures. Access to cracks on these tanks is very difficult.
Severe pitting and large areas of corrosion prohibits welding repair for aluminum tanks and steel tanks. The only option possible is to place the patch on the corrosion covered area. The patch must be large enough to cover the corrosion affected area with edges of the patch extending to the unaffected metal. These patches could be very large. And sometimes they must be bent to adjust to the shape of the tank's wall. Even in case of steel tank the patch bending procedure could be risky due to unknown degree of corrosion. In case of aluminum tanks patch bending is almost impossible.
Disregarding the many obstacles when welding repair of metal water tank, this way of leak repair is very costly, takes time, requires skilled welder and water must be drained.
Using rust converter and metal glue on leaky, metal water tanks
Using metal glue and rust converter on the outside walls of a leaky water tank can be used in emergency situations. And the whole procedure can be done without draining the water from the tank. The outside application of metal glue provides a rather semi-permanent solution since it will stop working when crack, rust, corrosion area, or severe pitting will grow outside the metal glue patch.
The inside application of rust converter or corrosion converter and the metal glue provides a permanent solution to the leaky water tank. Unfortunately, for inside application the water must be drained and inside application must be feasible. Many small tanks have a very restrictive access and special tools must be used for inside application. These tools, although effective for simple shape water tank, increase the use of epoxy glue. Large water tanks usually provide enough access to the treatment spots.
The inside application requires more of the metal glue since the application areas are rather large. Therefore, we need to know much in advance how much material we will need to order sufficient volume. We also recommend applying 1/8” thickness of metal glue with specific corrosion resistance properties that will permanently increase prevention of corrosion.
Use of plastic glue for plastic leaky water tanks
The cracked, leaky plastic water tanks are only accessible from outside and many of them do hold chemicals and water. Based on our experience, welding plastic technology although tempting does not provide proper sealing. The only option left is to apply epoxy plastic glue on the crack of the container if the crack is small. However, large cracks must be stitch welded prior epoxy plastic glue application.