Tip 1: What is perforating corrosion

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Tip 1: What is perforating corrosion

Through corrosion - through hole on the body of the car, caused by rust. The chemical and mechanical treatment of the body, in particular soil converters, can help to remedy the situation.

Through corrosion - through hole on the bodycar or, in a simple way, a "hole". The reasons why rust corrodes the car from the inside, can be associated with a violation of the technological process or the use of poor-quality materials. And from this, neither the budget domestic cars nor expensive import representatives are insured.

Reasons for this phenomenon

The theorem of a "stainless imported car"Evidence is not found, the machines as rusted, and continue to rust. The only difference is only in the speed and number of foci of corrosion, and these factors directly depend on the following reasons: Individually engineered body geometry and engineers miscalculations in manufacturing technology, dishonesty of some manufacturers who only "smear the lips" of the machine, "forgetting" about processing hard-to-reach places . Often, only a surface of some joints is treated with a narrow layer of anticorrosive composition. In this case, the bottom of the car and the cavities hidden from the eyes remain practically unprotected. It is not uncommon for a buyer to discover the first signs of corrosion at the inspection stage of a car in a shop. High concentration of sulfur compounds and saline solutions in the atmosphere of large cities and megacities.

Methods for removing corrosion

If it is required to carry out anti-corrosion treatmentthe car with the purpose of struggle against corrosion, it is necessary to achieve its full removal. If the rust is not completely removed, the body will collapse further. In practice, several methods of removing corrosion are used, the most popular are mechanical and chemical methods. Types of machining: - Sand blasting, involving the rusting of metal from the surface of the metal with sand under high pressure; - grinding by hand with sandpaper; - machine grinding. Chemical treatment consists in the destruction of the existing damage by chemical means. For this purpose, washable and indelible rust converters are used. Washable solutions cope with their task by 100%, but the main condition for their use is fast drying of the surface after treatment with water. Otherwise, body repair can be delayed for a long time. Non-washable formulations react with rust, converting it into a coating suitable for painting. These mixtures are called soil-converters. And although the quality of such processing does not compare with the quality of coating on pure metal, this method has a great future, since every day the converters cope with their task better and better.

Tip 2: What is geometry?

Geometry Is a science that studies spatialstructure, as well as the rules of their relationship and ways of generalization. It belongs to mathematical disciplines. The word is translated from Ancient Greek as "land surveying", since for the first time the geometry was used to calculate the accuracy of the measurement of the land plots that the Greek population was allocated to.

Instructions

Geometry - this is today quite extensivescience, and the fundamental statements for some of its sections may contradict equally important statements for others. Therefore, Felix Klein (author of a one-sided surface, known as the Klein bottle) created a classification of sections of geometry. The principle was based on the principle that each section should study those properties of geometric objects that, in the transformation of these objects, would remain constant according to the rules of this particular section (in other words, they are invariant properties).

Euclidean geometry is a branch of this science,Studied at school. This kind of geometry is characterized by the fact that degree measures of angles when moving in space do not change, the sizes of the segments also remain constant. In other words, such transformations of figures as reflection, rotation and transfer leave the figures themselves unchanged. Euclidean geometry, in turn, is divided into two main sections. This is planimetry - a science that studies the behavior of figures on a plane, as well as stereometry, which considers figures in space.

Projective geometry is a section in whichmethods of constructing projections of various types of figures under different conditions are studied. It is believed that if one figure is replaced by a similar one, but having a different size, then all the fundamental properties of this figure in this section of geometry remain unchanged.

Affine is a kind of geometry that studies variousaffine transformations of figures. Straightforward transformations of this kind necessarily pass into lines that are similar in properties, while the lengths of objects and the angles can vary.

Descriptive is an applied kind of geometry, thenthere is a discipline related to engineering. By using orthogonal or oblique-angled projections, descriptive geometry represents a three-dimensional object on the plane, providing it with exhaustive information necessary for its reproduction.

There is also modern geometry, in whichIncludes such sections as the geometry of multidimensional spaces, various types of non-Euclidean geometry (including the Lobachevsky geometry and spherical geometry), Riemannian manifolds, and topology. Each of them has its own interesting properties.

All kinds of geometry in the calculation allowTo use certain methods, and on the basis of this criterion they fall into two categories. The first of these, analytical geometry, in which all objects are subject to description by means of equations or cartesian (less often affine) coordinates. Calculations are performed using algebraic methods and material analysis. Differential geometry allows you to specify objects with the help of differentiable functions and studies them, respectively, using differential equations.