SPOTLIGHT – Electrical Components and Corrosion Protection:

Some of the first areas of a jet ski to exhibit the corrosiveness of salt water are the electrical components such as the starter solenoid relays. To provide a simple test to show how a stock (after-market) starter with zinc-plating would compare to a SLICKSHIELD™ coated version of the same model, we ran a 200-hour salt fog test using the parameters of the ASTM B117 standard

PLEASE NOTE: This test was done on an after-market relay and is not intended to represent what should be expected if the same test was done on an OEM version of Kawasaki’s own starter solenoid relay.

Test parts:

The starter was purchased from DB Electrical and was advertised as good for KAWASAKI 550, 650, 750, 800 and 900 Jet Skis. Out of the box, they looked like this:

Dyna-Tek : Jet Ski Salt Fog Test

Salt Fog testing done in-house using our Inland Testing Model WTS-90 Salt Fog/Spray Chamber

Dyna-Tek : Jet Ski Salt Fog Test

Below are two after-market Starter Solenoid Relays.
The one of the LEFT is straight out of the box while the one on the RIGHT was coated with SLICKSHIELD.

Start the Accelerated Salt/Fog Corrosion Test!

After 24 hours…

Dyna-Tek : Jet Ski Salt Fog Test - 24 Hours

At the 48-hour mark, the out-of-the-box relay (LEFT) has begun to show noticeable signs of corrosion and the SlickShield coated relay remains unaffected.

Close-up pictures of each at 48 hrs…


Dyna-Tek : Jet Ski Salt Fog Test - 48 Hours

The Salt Fog lid was closed again and testing resumed.

After 100 hours…

Dyna-Tek : Jet Ski Salt Fog Test - 100 Hours

At 200 hours.

Dyna-Tek : Jet Ski Salt Fog Test - 200 Hours

At the 200-hour point, both Starter Relays were pulled from the Salt Fog Chamber for evaluation.


Dyna-Tek : Jet Ski Salt Fog Test - 200 Hours

Close ups of each Relay showed that significant white corrosion had taken hold on the surface the uncoated part.

After the initial pictures, we clean each part with warm water and a soft linen towel. The purpose of this is to remove as much of the zinc oxides (white) that have built-up on the parts to better see the corrosion underneath it. The excessive white oxide build-up can often be due to the quality chromate in the zinc plating. All zinc plated parts are chromated to protect the zinc. (As a matter of perspective, a high-quality zinc plating can typically last up to 300 hours before exhibiting white rust.)

This produced the following picture:


Dyna-Tek : Jet Ski Salt Fog Test - 200 Hours

Disclaimer: This test was merely an initial trial to show the differences between coated and uncoated Starter Relays between the selected parts. There was no additional data collected prior to or after the testing to better qualify the results of the test.


The testing that has been done to date under more controlled testing parameters has produced over 1,000 hours of salt fog results before initial signs of corrosion occur. Salt fog testing isn’t a test that translates into real world metrics that can be quantified, but it does present a fair playing field for testing the legacy finishing solutions that make up the status quo in the marine watercraft markets.

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