Section 10

Section 10Corrosion Protection

Section 10 Corrosion ProtectionRequirementsTypes of ProtectionCathodic ProtectionPipingSTIP3 TankRecordkeeping

Section 10 Requirements

Corrosion ProtectionAll metal components of UST System must have Corrosion Protection for components in contact with ground

Federal and state regulations require that all unprotected underground metal components of a UST system must have corrosion protection.Section 10 Types

Corrosion ProtectionCompletely non-corrosive materialSteel-clad TanksCorrosion-resistant coating with Cathodic ProtectionInterior tank liningCathodic ProtectionCombinations

The types of acceptable release detection for pipes are:Completely non-corrosive materialSteel-clad tanksCorrosion resistant coating with cathodic protectionInterior tank liningCathodic protectioncombinationsSection 10 Cathodic

Corrosion ProtectionPrevents corrosion by making the ferrous substrate the Cathode of an electrochemical cellDesigned by Corrosion ExpertGalvanic AnodesImpressed Current

Cathodic protection prevents corrosion by making the ferrous substrate the cathode of an electrochemical cell. Cathodic protection must be designed by a corrosion expert.

Galvanic anodes , also known as sacrificial anodes, Can be attached to the UST for corrosion protection. Sacrificial anodes are pieces of metal more electrically active than the steel UST. Because these anodes are more active, the corrosive current will exit from them rather than the UST. Therefore the UST is protected while the attached anode is sacrificed.

Impressed current systems use a rectifier to covert alternating current to direct current. This current is sent through an insulated wire to the anodes, which are special metal bars buried in the soil near the UST. The current then flows through the soil to the UST system, and returns to the rectifier through an insulated wire attached to the UST. The Ust system is protected because the current going to the UST system overcomes the corrosion-causing current.Section 10 Piping

Corrosion ProtectionCompletely non-corrosive materialCorrosion-resistant coating with Cathodic ProtectionCathodic ProtectionCoating with di-electric material

Some of the methods of corrosion protection for piping are Completely non-corrosive materialCorrosion-resistant coating with cathodic protectionCathodic protectionCoating with di-electric materialSection 10 STIP-3 Tanks

Corrosion ProtectionThree types of protectionHeavy-duty anti-corrosive coatingCathodic ProtectionDi-electric or nylon bushings

An STIP-3 tanks has three types of protection:

a heavy duty anti-corrosive coatingcarthodic protectiondi-electric or nylon bushings.Section 10 Recordkeeping

Corrosion ProtectionTest within 6 months of installationTest minimum of once every 3 yearsReports from the last 2 tests must be retained

All new corrosion protection systems must be tested within 6 months of installation. They must be tested a minimum of once every 3 years, and reports from the last two tests must be retained.