PARNA LOKOMOTIVA -STEAM LOCOMOTIVE JŽ 33-110 PIVKA IN JŽ 740 121 POSTOJNA

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Največji in najtežji eksponat v Parku vojaške zgodovine

140 ton težka in 23 m dolga lokomotiva je bila izdelana za potrebe nemške vojske leta 1943. Po osvoboditvi, je bila vključena v civilni promet po slovenskih tirih, kjer je služila do 11. aprila 1978, ko je s slavnostno vožnjo od Ljubljane do Postojne zaključila obdobje parne vleke v ljubljanskem železniškem vozlišču. Od takrat pa do maja 2016, ko je bila prepeljana v Park, je propadala pred železniško postajo Štanjel.

Helios poskrbel za funkcionalno in trajno zaščito

Prenova protikorozijske zaščite lokomotive je predstavljala zanimiv strokovni izziv. Že v samem začetku se je vodstvo Parka skupaj z Železniškim muzejem Slovenskih železnic odločilo, da se lokomotive ne restavrira v originalno stanje z uporabo materialov, ki bi bili čim bolj podobni prvotno vgrajenim, temveč je izbiro materialov prepustilo strokovnjakom Heliosa z usmeritvijo, naj bo zaščita funkcionalna in trajna. Odprto pa je ostalo vprašanje izgleda. Predvidevalo se je, da je bila lokomotiva v originalu temno siva z le najnujnejšimi oznakami v beli barvi, ne pa, kot si nas večina predstavlja parne lokomotive, črna z rdečimi in belimi okrasnimi obrobami.

Muzejskega eksponata pa ni mogoče obnoviti le na podlagi predpostavk. Zato smo na lokomotivi in tenderju odvzeli vrsto sond nanesenih premazov in jih s pomočjo mikroskopije analizirali v Heliosovem Fizikalno analitskem laboratoriju. Pokazalo se je, da je bila na vsaj nekaj delih lokomotive prisotna originalna barva, temno siv pokrivni premaz v niansi RAL 7021, na lokomotivi nanesen na oksidno rdeč temelj, na tenderju pa na temelj v niansi RAL 9007, ki je bila razvita pred drugo svetovno vojno specifično za protikorozijski program nemških železnic. Iz analize je očitna tudi zgodovina obnov lokomotive, ob samem remontu so na obstoječe premaze nanesli po sloj temelja in pokrivnega premaza, tako da se je na mestih nabralo tudi za centimeter premazov.

The largest and heaviest exhibit in the Park of Military History

The locomotive, weighing 140 tonnes and measuring 23 m in length, was designed for the needs of the German army in 1943. Following the liberation, it was used for civilian transportation along Slovenian tracks, where it served until 11th April 1978, when it ended its steam traction period in the Slovenian railway hub with a celebratory ride from Ljubljana to Postojna. From then until May 2016, when it was brought to the Park, it was languishing in front of the Štanjel railway station

Helios ensures functional and lasting protection

The restoration of the locomotive’s corrosion protection was an interesting professional challenge. From the very beginning, the management of the Park together with the Railway Museum of the Slovenian Railways decided that the locomotive should not be restored to its original state by using materials as close to the original as possible; rather, the choice of materials was left to the Helios experts, with the aim of ensuring functional and durable protection. The question of design however, remained open. It was assumed that originally, the locomotive was dark grey with only the most essential markings in while, and not black with red and white decorative borders, as most of us envisage.

Of course, a museum exhibit cannot be restored solely on the basis of assumptions. Consequently, we took a series of probes of applied coatings on the locomotive and tender, and analysed them using microscopy in the Helios Physical Analytical Laboratory. It turned out that the original paint was present in at least some parts of the locomotive: dark grey coating in the shade RAL 7021 and an oxide red base. On the tender, there was a base in the shade RAL 9007, which was developed before WWII specifically for the German Railways’ anti-corrosion programme. The history of the locomotive’s restoration is also evident from the analysis. During the overhaul, they applied a layer of base and cover coating on the existing coatings, so that in places coatings a few centimetres thick accumulated.