Competitive Comaprison
All rights reserved © 2009 Mahip Industries
PARAMETERS
STANDARDS’
REQUIREMENTS
MAHIP SALT
SPRAY APPARATUS
COMPETITIVE
CHAMBERS
Temperature Control
Of Chamber Atmosphere
Chamber Atmosphere
Salt Solution
Precipitation Rate of
Fog
1-2 ml/80sq.cm./hr
1-2 ml/80sq.cm./hr
throughout
No measurement/
Control At best,  point
control
pH of Sprayed Sol.
Consistently in Range -
6.5-7.2/ 3.1-3.3
Consistently in Range
At best, erratic control
Humidifier
Necessary. With
Continuous Level Control
Present With Continuous
Level Control
Usually no humidifier
present
Heater-Electrical
Not permitted  inside
the Chamber
Not present inside
Chamber
No Immersion/ air
heaters present inside
the chamber
Construction
No metal permitted
inside Chamber
No metal present inside
Chamber
SS Spray nozzles, etc.
present inside
Chamber.
Capacity
15c.ft. / 400 Lt minimum
431 Lt/ 15.2 c.ft.
150-200 Lt.
Consistency of Results
Consistent throughout
the year
Consistent throughout
the year
Inconsistent even
during day & night.
Recycling of Spray
Solution
Solution once sprayed
should be disposed off
No recycling
Recycling
Fog Venting
To be provided
Provided
Not provided.
Digital Temp Display
Logging & Control
-
Provided
Usually Not provided
Integrated Castor
mounted Model
-
Fully integrated
Not integrated
Direct Impingement of
Spray
Not Permitted
Continuous Deflected
Super Fine Fog/Mist
Intermittent Direct
spray of Solution
droplets.
Electrical Safety
Features
-
Provided
Not Provided
Failure prevention
tech.
-
Provided
Not Provided
Test validity check
(audit) facility
-
Provided thru proprietary
software
Not possible
Dependence on
trained operator
-
Low
High
The conventional Salt Spray Apparatus having a plastic chamber fitted with spray nozzle
using salt water and pressurized ambient air fails to meet even the principal specifications of
ISO 9227 on Chamber temperature and Precipitation Rate control, which are necessary
for valid evaluation of test samples. Most of these equipment control the temperature of
the
salt  solution (not chamber atmosphere) using electric immersion heater. A few use
glass encased air heaters inside the chamber or immersion heaters in the chamber walls to
heat the chamber. While the former have no control over chamber temperature, the
latter have large temperature gradients spanning upto 10°C. This coupled with no or
improper precipitation rate control leads to unpredictable results and very poor test
consistency. For example, two identical samples drawn from the same will give different
exposure values in summer and winter, or even day and night !

Mahip Salt Spray Apparatus employs innovative process control technologies to accurately
control chamber temperature within 1°C (without use on any immersion/ air heaters inside
the chamber, as required by the Standard) at all points in the chamber. The  precipitation
rate is also controlled at all points in the chamber. The end result is CONSISTENCY. Your
test results become unquestionable. But before that, your processes improve to a level
that your products and anti-corrosion processes rise above suspicion.

Mahip Salt Spray Apparatus is now equipped with the State-of-the-art Programmable Logic
Controller and a (Windows based) Real time OS based 7”  Touchcreen type Human
Machine Interface. Plainly said, the machine has now a much reduced dependence on a
trained operator. Besides, the inbuilt Datalogger keeps a record of the chamber
temperature every two minutes. A record of about last 100 hours can be accessed to
assess the authenticity of the testing procedure.
Salt Spray Test Chambers India, Salt Spray Apparatus India, CASS Test India, SST Chambers India, Salt Fog Testing India, ASTM B117, ASTM B368, ISO 9227