When running a salt spray chamber, the provision of heating element(s) to maintain the chamber at certain temperature is essential requirement.

There are several approaches to do it, normally an immersion heating is used.

Immersion heating

Several benefits makes the immersion heating been used on more than 70% of salt spray chambers.

  1. Heat up quickly.
  2. Easy to use.
  3. Easy to maintain.
  4. Lower costs.

Figure 1 Immersion Heating

But, the main disadvantage of immersion heating is that there are much vapor in the mixed air in test area. When performing NSS, the vapor is still acceptable. But when performing CASS or AASS, the vapor will increase salt fog’s pH value way higher than desired 2.8-3.2.

Dry heating

The dry heating is developed as another approach to maintain the chamber’s temperature. The main benefit is that this heating do not create any vapor in test area, which will be able to maintain the salt fog’s pH and concentration values during whole testing.

Figure 2 Dry Heating

Weice’s dry heating element is made by titanium which is the best material to resist corrosion, the heater surface is also teflon coated which enhance its resistant ability to excellent.

WTS/M2 Salt Spray Chambers

Weice’s M2 Salt Spray Chambers have all the benefits of standard WTS chambers, the dry heating makes these chambers are able to perform NSS, CASS and AASS by one chamber.

Extra protective system is also employed to protect the dry heating element.

Figure 3 WTS60/M2 Salt Spray Chamber