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Altsybeeva, A.I.; Burlov, V. V.; Kuzinova, T. M.

doi:10.1023/a:1022963415233

Cited by 2 publications

(6 citation statements)

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“…The results of the corrosion tests of steel St3 and copper M1 in the presence of the VNKh-L-408 inhibitor in all its recommended forms are summarized in Table 2 (see also Table 4 in [1]). It follows from the data obtained that:…”

Section: Starting Materialsmentioning

confidence: 99%

“…In [1], we have demonstrated that thermally stable molecular compounds such as Schiff and Mannich bases are promising as volatile inhibitors of atmospheric corrosion (VIACs) of ferrous and nonferrous metals. When choosing an inhibitor that can be recommended for development of the commercial production technology, we considered the range of metals protected by the inhibitor and fast protection for dissimilar metals achievable by such inhibitor.…”

mentioning

confidence: 99%

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Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals III. VNKh-L-408 inhibitor: basics of production and application technology

Altsybeeva¹,

Burlov²,

Fedorova³

et al. 2013

Int. J. Corros. Scale Inhib.

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Criteria for selection of inhibitors based on their metal corrosion inhibition factors in an environmental chamber have been proposed. It has been demonstrated that a wide range of ferrous and nonferrous metals are efficiently protected by 1-(morpholino)(phenyl)methylbenzotriazole conventionally named as VNKh-L-408. The basics of its production and application technology have been developed. In [1], we have demonstrated that thermally stable molecular compounds such as Schiff and Mannich bases are promising as volatile inhibitors of atmospheric corrosion (VIACs) of ferrous and nonferrous metals. When choosing an inhibitor that can be recommended for development of the commercial production technology, we considered the range of metals protected by the inhibitor and fast protection for dissimilar metals achievable by such inhibitor. Accelerated corrosion tests are carried out under the assumption that the atmospheric corrosion of metals follows the same mechanism, whether under natural conditions or in an environmental chamber. In the latter case, several cycles are usually required to initiate corrosion. The degree of corrosion depends on the resistance of the metal to atmospheric corrosion, provided that the test duration is the same.According to GOST (State Standard) 9.509 [2], it is nearly always required to choose a proper test cycle (for a specified testing method) from test results for some protective agent with a known protection period certified by industrial testing. The proper test cycle in an environmental chamber was determined from the protection periods of the NDA and KhTsA inhibitors specified in GOST 9.014 [3]. One test cycle corresponds to ~3.5-4 months of storage in an unheated warehouse or under a shed in an industrial coastal town.Because dissimilar metals differently corrode in air in the absence of inhibitors, it is advisable to assess the efficiency of an inhibitor from the inhibition factors of metal

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Section: Starting Materialsmentioning

confidence: 99%

mentioning

confidence: 99%

Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals III. VNKh-L-408 inhibitor: basics of production and application technology

Altsybeeva¹,

Burlov²,

Fedorova³

et al. 2013

Int. J. Corros. Scale Inhib.

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“…A special series of studies was devoted to inhibitor protection of crude oil distillation plants in working mode [6,7]. Detailed studies showed that contemporary industrial amidoimidazoline inhibitors are complex mixtures of mono-, di-and aminoamides, imidazoline bases, quaternary salts, as well as unreacted polyamines and organic acids.…”

Section: Columnmentioning

confidence: 99%

“…These processes start in industrial products as early as after ~3 months of storage. "Ageing" changes the hydrophobic-hydrophilic balance of molecules and increases the liability for micellization, which, along with a decrease in adsorption capability, impairs their efficiency [1,6,7].…”

Section: Columnmentioning

confidence: 99%

“…A fundamentally new approach to the selection of starting products and reactions for synthesizing versatile volatile inhibitors of atmospheric corrosion (VIAC) based on correlation analysis of the dependence of the VIAC protective capability on their physicochemical and molecular properties allowed a new class of VIACs, viz., Schiff and Mannich bases, to be synthesized [8][9][10][11][12]. The inhibitor with conventional name VNKh-L-408 is the most efficient.…”

Section: Columnmentioning

confidence: 99%

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A new approach to resolve problems in the corrosion protection of metals

Burlov¹,

Altsybeeva²,

Kuzinova³

2013

Int. J. Corros. Scale Inhib.

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It has been shown that corrosion damage of equipment at an oil refinery plant as a common organism is determined by the combined effect of the process media at all stages of operation. Corrosion charts of units have been composed. Methods for the protection of oil refinery plant equipment from local and downtime corrosion, issues of material selection for cladding of surfaces of vessels and pipelines, and an up-to-date scheme of inhibitor protection of oil processing units in operation have been discussed and proposed. A new approach to the choice of starting products and reactions for synthesizing versatile inhibitors of atmospheric corrosion is considered. A new versatile fungicide inhibitor, VNKh-L-408, has been synthesized using this approach. The reliability and operating capability of units and various kinds of oil processing equipment depend on strict adherence to the operating regulations and on corrosion factors, on the one hand, and on correct choice of materials during design and on the quality of construction activities, on the other hand. Currently there are three guiding engineering manuals (GEMs) developed by VNIINeftemash in 1978-84 for selection of construction materials during the design and upgrading of the main units at domestic oil refinery plants. These GEMs are mandatory for design companies and oil refinery plants. Unfortunately, they are obsolete to a considerable degree and nearly no attention is paid therein to the local corrosion of structural metals and alloys. They either lack data on the likelihood of pit and ulcerous corrosion, as well as corrosion cracking, or, conversely, contain overrated data. They also lack data on the composition and corrosivity of deposits and steam treatment condensates that play an important role in the initiation and intensification of both general and local corrosion of metals.The majority of oil refinery plants in Russian Federation have been put into operation 35-40 years ago. Therefore, the necessity of equipment upgrading and replacement became extremely urgent due to both expiration of the rated equipment life and a considerable Int. J. Corros. Scale Inhib., 2013, 2, no. 2, 92-101 93 metal corrosion, especially local corrosion. These circumstances require considerable adjustments in the design standards with consideration for the real corrosion problems found during operation of units.However, neither the GEMs nor the available international literature treat an oil refinery plant as a common organism with interconnected units that are operated sequentially: "start → production mode → shutdown (for repair or due to other reasons) → steam treatment → drying → repair → start … etc.", and corrosion damage is determined by the joint effects of the process media at all operation stages.The main reason of intense corrosion damage of equipment in process units during shutdown and repair periods lies in the presence of deposits in vessels and pipelines. The chemical composition of the deposits and the ratio of various compounds therein are dete...

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Cited by 2 publications

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Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals III. VNKh-L-408 inhibitor: basics of production and application technology

Volatile inhibitors of atmospheric corrosion of ferrous and nonferrous metals III. VNKh-L-408 inhibitor: basics of production and application technology

A new approach to resolve problems in the corrosion protection of metals

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