Coating advancements fuelling the adoption of UHP water jettingas surface preparation method over aged and new steel
This paper has four objectives: 1. explain the limitations of Ultra High Pressure (UHP) water jetting for steel surface preparation when high durability is required; 2. report a coating technology able to remove such limitations; 3. illustrate the use of that coating solution with practical field data; 4. report how the concept expanded to new steel construction. Key reasons limiting UHP use are discussed (mind set, negative track record, speed, flash rust, lack of roughness, dampness). The paper describes a specific coating technology helping UHP adoption, by addressing the obstacles listed above, tolerating dampness, low dew point, poor surface profile and flash rust. Performance evidence and practical examples are given, including customer testimonies, over different types of projects. Two practical cases of UHP use in new building are described, one where the shipyard was designed around the concept, the other in an existing shipyard uses the concept to better adapt to new steel fabrication. Cost, time and overall project predictability impact is reported. The paper concludes that all key technical barriers to the adoption of UHP as surface preparation method, both over aged and new steel, have been removed with the help of proper coating technology selection. The removal of the perception barrier to such adoption is a work in progress, that this paper attempts to contribute for.
Keywords: Ultra High Pressure (UHP) water jetting, surface preparation, coating technology
2018. Vol. 61, nr 9, pp.248-254
Influence of heat treatment on the corrosion resistance of Ti-6Al-4V alloy in artificial saliva
AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23 street, Kraków, Poland
The effect of the heat treatment on the corrosion resistance of Ti-6Al-4V alloy was investigated in the artificial saliva solution (MAS). It has been revealed that the thermal annealing treatment temperature significantly changes the properties of the passive film formed on Ti-6Al-4V alloy and decreases its corrosion resistance in the artificial saliva. Enrichment in vanadium of passive film formed on the specimen after heat treatment Ti-6Al-4V_HT favors the cathodic reactions and reduce the protective properties of passive film.
Keywords: titanium alloys, corrosion, heat treatment
2018, Vol. 61, nr 9, pp. 255-258
CORROSION PROTECTION IN PRACTICE
RBI as a novel approach for pressure equipment inspection
PKN ORLEN S.A.
RBI (Risk Based Inspection) methodology is an integral part of risk management, focused on the improvement of the effectiveness of pressure equipment’s workability. At the beginning prerequisites and foundation documents API (American Petroleum Institute) have been described for the RBI methodology, considered as controlled for risk assessment. Rudimentary changes with novel philosophy implemented have been discussed at the point of the former approach to pressured equipment periodic control. The supremacy of the risk assessment approach has been emphasized as the result of confusing failure probability and consequence with individual inspection schedule. At the end the effects of the RBI implementation as the safety level increasement factor as well as workability improvement have been discussed.
Keywords: RBI (Risk Based Inspection) methodology, risk management, pressure equipment, safety
2018, Vol. 61, nr 9, pp. 259-261
CORROSION PROTECTION IN PRACTICE
Required competences and types of qualification of anticorrosion personnel in Poland and Germany – similarities and differences
SLV-GSI Polska Sp. z o.o.
Examples of requirements in different topics of corrosion protection in Poland and Germany are presented, especially under consideration of the requirements for the personnel. In the German market following standards are named: EN 1090, ZTV-ING and VBG/BAW, construction of offshore wind turbines and components of wind parks. In the Polish market there is an explanation of the standard EN 1090 and available requirements for selected types of constructions. The requirements for personnel are referred to the possibility of passing the training by certificates like KOR Schein, Frosio certificate and IBDiM inspector.
Keywords: corrosion,personnel, competences, FROSIO inspector, ZTV-ING, VBG/BAW, construction of wind turbines
2018, Vol. 61, nr 9, pp.262-265