Мислиш ли, че това може да се повтори в сервиз? Както каза Мунс, пак има начин, ама почти никой няма да си направи толкова труд.
M3ntata, не сменяй прага

Strosner написа: някои хора
ktamen написа:"Някои хора" сме пробвали сменени прагове. Затова и знаем какво се случва.
Явно не знаеш какво е стъкломат и как се работи с него.
M3ntata написа:инжектопляктор/ Аз също мисля, че проблема идва от изгарянето при заварянето. Лично аз не съм виждал гърне да се пробие от не заваряната част, тоест винаги се отваря дупка около заварката. Сега дали майстора не преценява електрода или наистина е заради изгарянето..
Welding Practice toMinimize Corrosion
Several methods are available to minimize corrosion in weldments (Ref 36). The most important of these are discussed below.
Material and Welding Consumable Selection
Careful selection of materials and welding consumables can reduce the macro- and micro-compositional differences across the weldment and thus reduce the galvanic effects. Surface Preparation. A properly selected cleaning process can reduce defects that are often sites for corrosive attack in aggressive environments. However, the cleaning process can also be a source of trouble. For example, any mechanically cleaned surface (i.e., cleaned
by sand blasting or grinding) can leave impurities on the surface. The type of wire brush used can also be an important consideration (Ref 36). Stainless steel brushes are generally preferred because they do not form corrosion products
capable of holding moisture. Welding design should promote deposits that have relatively flat beads with low profiles and have minimal slag entrapment. A poor design can generate crevices that trap stagnant solutions, leading to pitting and crevice corrosion. Irregular weld deposit shapes can promote turbulent flow in a tubular product and result in erosion corrosion.
Welding Practice Complete penetration is preferred to avoid underbead gaps. Slag should be removed after each pass with a power grinder or power chipping tool. If the welding method uses flux, the geometry of the joint must permit thorough flux removal, because many flux residues are hydrophilic and corrosive.
Weld Surface Finishing The weld deposit should be inspected visually immediately after welding. Maximum corrosion resistance usually demands a smooth uniformly oxidized surface that is free from foreign particles and irregularities (Ref 34). Deposits normally vary in roughness and in degree of weld spatter, a concern that can be minimized by grinding. For smooth
weld deposits, wire brushing may be sufficient. For stainless steel, however, brushing disturbs the existing passive film and may aggravate corrosive attack.
Surface Coating When a variation in composition across the weld metal can cause localized attack, it may be desirable to use protective coatings. The coating needs to cover both the weldment and the parent metal and often requires special surface preparation.
Postweld Heat Treatment. A postweld heat treatment can be an effective way to reduce corrosion susceptibility. This improved corrosion resistance is accomplished through a reduction in residual stress gradients that influence SCC growth. Postweld heat treatment can assist in the transport of hydrogen from the weldment and reduce susceptibility to hydrogen cracking. The treatment can also reduce compositional gradients (i.e., microsegregation) and corresponding microgalvanic cells.
Preheat and Interpass Temperature. The selection and use of proper preheat treatment and interpass temperature may prevent hydrogen cracking in carbon and low-alloy steel.
Passivation Treatment. A passivation treatment may increase the corrosion resistance of stainless steel welded components.
Avoidance of Forming Crevices. Slag that is still adhering to the weld deposit and defects such as lack of penetration and microfissures can result in crevices that can promote a localized concentration cell, resulting in crevice corrosion. Proper selection of welding consumables, proper welding practice, and thorough slag removal can alleviate this form of corrosion damage.
Removing Sources of Hydrogen. Through proper selection of welding consumables (that is, low-hydrogen shielded metal arc welding electrodes), proper drying of flux, and welding clean surfaces, the hydrogen pickup can be dras-
tically reduced.
ktamen написа:Инжектоплякторе, Точно този праг със стъклопласт ще стане несравнимо по-трайно от всеки друг начин.
инжектопляктор написа:Само че стъклопластът е чуплив
инжектопляктор написа:А как е монтирана ламарината в завода? С Ц200, каноколит или тапетно лепило?
Върни се в “Golf, Vento, Jetta & Bora”
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