Banner_2

Correo electrónico

Scale & Rust

The Scale and Rust Problem

What is lime-scale? Scale mainly consists of calcium and magnesium - two minerals that by themselves have a healthy effect on the human body. However, what is good for living organisms quickly becomes a scale problem as scale deposits in the piping system, in machinery or on surfaces around the house. So-called hard water holds high concentrations of calcium: the more calcium in the water, the harder the water and more problems.


The birth of scale deposits
Scale builds up as soon as hard water flows through a pipe. Calcium in untreated water crystallizes into a sticky structure (1). These crystals adhere to each other, adhere to surfaces and immediately produce solid scale deposits that have a very destructive effect.
Scale grows in particular when the water pressure changes. This happens when water changes direction in a bend or intersection which then causes turbulence; or when it leaves the piping system through a faucet. This drop in pressure enhances the formation of calcium crystals, which form a burr-like structure that adheres anywhere. Scale also particularly forms in warm areas such as on heating elements or radiators. The hotter the surfaces, the more scale will develop. Typical problem spots are heating elements, water heaters etc.


More scale-related problems: rust and bacteria Scale is a foreign substance to the pipe wall that causes tremendous problems by acting as blockage. It also has a destructive effect on machinery parts. Unfortunately, scale deposits also attract other unwanted substances which again create even more problems and threats:


Rust - a common problem in combination with scale The main components of scale are calcium and magnesium. This would lead us to the believe that scale deposits have a white color. However, most scale deposits are red. The reason behind this lies in the relationship of scale and rust. As soon as scale deposits have built up, all iron and oxidized iron particles imbed into the scale. This creates the red color. This also means that rust is firmly attached to the pipe which causes a serious threat to the pipe by pitting corrosion.


Dangerous bacterial growth in the scale sockets Scale deposits are also perfect breeding grounds for bacteria and other unwanted micro-organisms. As the deposits have an uneven, rough surface, these little sockets are a perfect hide-out for bacteria to nest in. Whether it is cold or hot water you will face an increase in potentially dangerous substances that linger on the scale.

Typical problems caused by scale and rust


	Blocked piping system
	Loss of water pressure due to a reduced pipe diameter
	Rust accumulation in the pipes that may lead to corrosion
	Bacterial growth in drinking water carrying pipes
	Repeated repairs or replacement of household appliances
	Replacement of the whole piping system
	Loss of energy in the hot water circuit and high costs for heating
	Dull surfaces in bathroom and kitchen
	High cleaning costs and the need of aggressive cleaning agents
	Malfunctioning machinery
	High production costs due to maintenance
	Long pauses in production when machinery has to be maintaned and cleaned leading to inefficient production planning
	Decrease in productivity

Scale_Rust_Problems_thumb

Scale_Rust_Problems_Pipes_thumb

Water Hardness Classification

Water Hardness

Water hardness	ppm Parts per million (mg/l)	GPG grains per gallons US	°dH German hardness	°fH French hardness
very soft	1-70	1.0 - 4.2	1.0 - 4.0	0.1 - 7.0
soft	71-125	4.3 - 7.2	4.1 - 7.9	7.1 - 12.5
medium hard	126-250	7.3 - 22	8.0 - 14	12.6 - 25
hard	251-500	23 - 30	15 - 21	25.1 - 50
extremely hard	501 and more	31 and more	22 and more	51 and more


Water Hardness in your country

Logo_BG