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Manufacturing a chemical means making
the users feel comfortable about the product. We are both proud and certain that
Dynamic
Descaler®is a well produced product that
is now being used around the globe.
We take pride in both the longevity and
low corrosion rates of our Dynamic Descaler®and we will challenge any and all
competitors in this area. Since early 1940 one competitor who has been well established still
states that their product is non-corrosive. One must ask,
"who has any experience in chemistry", how this is possible if their product has over
2.9% of hydrochloric acid in its
makeup?
We test
the Dynamic
Descaler®on a
regular basis. We use the same procedure as the US Navy using the guidelines of ASTM G31 which
consists of using 0.75" X 2" X 0.125" coupons. The coupons range from 90/10 to 70/30 copper
nickel. Most heat exchangers, condensers and evaporators
have this type of copper used. The coupons are ordered from Metal
Samples in Munford, Alabama, United States which is
the same source used by the US Navy.
The procedure is as
follows:
We place one of the pre-weighted coupons
in a 500 ml beaker with 450 ml of Dynamic Descaler solution. The pre-weight is the pre-test weight.
The coupon is submersed for six hours
and is held by a holding support.
After six hours the coupon is removed,
and set to dry for one hour on a dry cloth.
After drying the coupon is taken to an
independent lab called the Manufacturer's Testing Laboratory in Crowley, Texas, USA. Here the
coupon is cleaned and rinsed and dried thoroughly by their procedures to remove any
contaminants and weighed for a post-test weight. In this
way a true "coupon only" weight is obtained after being submersed in Dynamic
Descaler.
The difference in weight indicates the
corrosion. The coupon is weighed with an analytical balance to the nearest 0.1 mg. The weight is
typically in grams.
The weight difference is then converted
into mills per year as follow using ASTM G-31: Corrosion Rate = (Constant K x Mass in grams) /
(Area in cm2 A x Time in hours T x density in grams/cm3 D) or (K x W)/ (A x T x D). Corrosion
Constant K is 3,450,000 for mills per year (mpy). Other constants for K are 3,450 for inches per
year (ipy), and 87,600 for millimeters per year (mm/y).
If your company is using a descaler and
the manufacturer states that it has up to 10% of HCl (hydrochloric acid), (usually stated as less
than10% Hcl on a material safety data sheet) and implies that it is non-corrosive, you need to have
an independent lab conduct a corrosion test on the product as soon as possible for both the safety
of your employees and to your equipment.
The
Perfect Solution To Your Water Scale
Corrosion Rate Comparison Chart
Don't be misled by companies that claim their descaler is
"noncorrosive." The fact is that all effective descalers result in
some equipment corrosion. Therefore, to prolong the life of your equipment,
it's important to use a descaler with a low corrosion
rate.
Based on
corrosion tests done by an independent lab, Dynamic Descaler has the
lowest corrosion rate of any descaler.
Click
here for a copy
of the corrosion rate comparison
chart.
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