Why choose environmentally friendly deicers? What are the dangers of traditional chlorine salt deicers?

Chloride snow melting agent is the most commonly used in melting-snow and ice. It widely used due to its low cost. However, the use of this type of snow melting agent also brings negative huge damage, which are mainly reflected in its corrosive properties (on infrastructure, bridges, roads, parking lots, underground pipelines, automobiles, etc.), and freeze-thaw damage (on concrete Etc.) and environmental pollution (destruction of vegetation, contamination of groundwater, etc.).

Chloride penetrates into the concrete and accelerates the process of freezing and thawing of the concrete. But the worst damage it causes is still the corrosion of steel. When the chloride ions reach the surface of the steel bar and exceed a certain amount (critical value) the steel bar, which was originally in a passive state, is activated and corrodes. The corroded products expand

2~6 times, which causes the concrete protection layer to crack and fall off along with the reinforcement, resulting in a decrease or loss of the bearing capacity of the structure.is activated and corrodes.

In the early days, chlorine salt was used to melt ice and snow on roads and bridges by many foreign countries. In the last 5 to 15 years, the steel bars of many bridges have been corroded by the use of snow-melting agents.

In the United States 25% of the 500 thousand bridges had been corroded due to the use of chloride deicing agents by 1981. The number increased to 50% by 1993. The cost of repairing bridges is up to $155 billion in the United States.

In the United States 25% of the 500 thousand bridges had been corroded due to the use of chloride deicing agents by 1981. The number increased to 50% by 1993. The cost of repairing bridges is up to $155 billion in the United States.

In Britain, there are also typical examples of the danger of deicing salts. In 1972, after chloride deicing agents had been used for several years, 11 concrete bridges built on expressways developed cracks. Over the singular 15 years, the repair costs of the bridges were 1.6 times that the bridge itself. As of 2004, the cumulative repair fees of the bridge reached 6 times that of the building/construction of the bridge.

In Germany, because of the effect of chlorinated snow-melting agent, the years that the bridge can be used are reduced to less than 20 years, the steel bars of a certain large overpass bridge in Berlin have been seriously corroded, and a new overpass needed to be built next to it.

In Denmark, The rebar of half of the 102 bridges in Copenhagen have been seriously corroded. The main reason is the use of chlorinated ice salt.